Toy Physics--- tumbling toy -part 1 /// Homemade Science with Bruce Yeany

Ғылым және технология

Here are several versions of a tumbling toy that clearly show the motion of these toys as they rotate down a set of rails. A clear view of the inside and slow motion video clips allow the observer to see subtle movements that are missed when viewed at normal speeds.
Homemade science is a collection of classroom tested ideas, suggestions, projects, and experiments that I have used in teaching physical science for the Annville-Cleona school district in central Pennsylvania. I am currently in my 38th year of teaching. My intention is to share these ideas with other teachers or anyone who has an interest in science. I have found that designing and building my own equipment has taught me more than any course that I have ever taken. I hope that you consider making or trying these experiements for yourself.

Пікірлер: 213

  • @WoodFrontier
    @WoodFrontier7 жыл бұрын

    Fantastic work. I've been going through your videos over the past couple weeks and loving them.

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    thank you

  • @Fooglmog
    @Fooglmog7 жыл бұрын

    Two variations on this I'd be very curious to see: a) Using a non-newtonian fluid in the final tumbler. b) Placing a steel ball in the final tumbler, and filling it entirely with liquids (ie. no air pocket) of various viscosity.

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    not sure how the non-newtonian fluid wold be but I really like the steel ball in the fluid idea

  • @braedanricketts5139

    @braedanricketts5139

    6 жыл бұрын

    A little late to the video. Another interesting idea would be to fill it with multiple fluids of different densities. e.g. Oil and water.

  • @farseerflore9512
    @farseerflore95127 жыл бұрын

    Science and great DnB riffs! Awesome!

  • @tylerpauli680
    @tylerpauli6805 жыл бұрын

    I’ve been binge watching your channel last few days. Great work

  • @profetachinogaleaoficial640
    @profetachinogaleaoficial6407 жыл бұрын

    Thank you very much congratulations! Excellent vídeos, amazing proyect

  • @wolfgang4468
    @wolfgang44684 жыл бұрын

    Fantastic and inspiring, thank you!

  • @jigyasafoundation5560
    @jigyasafoundation55609 жыл бұрын

    Nice Work Mr Yeany ! We can see & realize the amount of work and personal interest you put in making the toy,and explaining the concept. Thanks You for inspiring the generation, we look forward to share your video.

  • @YeanyScience

    @YeanyScience

    9 жыл бұрын

    Jigyasa Foundation Thank you, this tumbling toy has been one of the harder pieces to design and build but I am pleased to share the end results. I have some simpler versions that that are just as much fun and very easy to build. I will post these in a second video on tumbling toys very soon.

  • @jigyasafoundation5560

    @jigyasafoundation5560

    9 жыл бұрын

    Bruce Yeany We liked it ! and take a start of exchange of ideas between us. We make (traditionally handcrafted) mechanical puzzles in teak wood here in India and do inspirational college workshops. We recently held an exhibition at a cultural fest here in Lucknow, India and got invited to the The Regional Science Center as the appreciation of our work- it feels great and hope you can feel the thought. We are subscribed to your channel & look forward to like your next video Warm Regards

  • @568min
    @568min8 жыл бұрын

    Thank you so much for your time sharing this helpful video

  • @DanBurgaud
    @DanBurgaud3 жыл бұрын

    I had tumbling toys in my childhood days... this brings back some of those memories...

  • @profetachinogaleaoficial640
    @profetachinogaleaoficial6407 жыл бұрын

    Thank you very much congratulations ! Excellent vídeos and project very good

  • @CabooseLoL
    @CabooseLoL7 жыл бұрын

    That would be one hell of a carnival ride hahaha

  • @coltonthedrummer
    @coltonthedrummer7 жыл бұрын

    Just found your channel. Loved the video and you now have a new subscriber!

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    thank you, glad you liked it

  • @PO13GR3G

    @PO13GR3G

    7 жыл бұрын

    Try the honey please.

  • @jacobduncan87
    @jacobduncan877 жыл бұрын

    very cool video. I like doing cool science experiments with my son and your channel has given us a lot of fun and new things to learn. I was thinking about the liquid tumbling toy and thought coconut oil would be an interesting one to put in their. liquid above 76 degrees solid below 76.

  • @alfredoespinozapelayo
    @alfredoespinozapelayo7 жыл бұрын

    excelente video, está genial, gracias

  • @donmorton9449
    @donmorton94492 жыл бұрын

    Hi Sir really I like your nice models God bless you abundantly

  • @alfredabbey6162
    @alfredabbey61626 жыл бұрын

    You have some very lucky students:-)

  • @nicholasalbeck7114
    @nicholasalbeck71147 жыл бұрын

    Bruce Yeany. Yeany meany miney mo. Mo' betta Bruce!

  • @YourNickIsTaken
    @YourNickIsTaken6 жыл бұрын

    I do like this video. Mechanical physics is always a fun thing to watch. Education and entertainment at the same place and time. I lu

  • @rafaelvenzal8772
    @rafaelvenzal87726 жыл бұрын

    It's Great! congratulation.

  • @thokk10289
    @thokk102897 жыл бұрын

    fill one with pitch it would take an eon to go down one peg

  • @OkayNiceOne
    @OkayNiceOne7 жыл бұрын

    Now make an escalator type machine to constantly provide more area for it to fall and now you have a infinite tumbly toy!

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    thank would be really cool

  • @mikedorton4730

    @mikedorton4730

    7 жыл бұрын

    Bruce Yeany Here is my email address michael.r.dorton@gmail.com

  • @rowestation
    @rowestation7 жыл бұрын

    It would be great to see if a viscous fluid like honey would work. Filming it in a time lapse, set outside with clouds going by, or crowds of people would be fun to watch. It would also smooth out the movements of the tumbling.

  • @1camerooon1
    @1camerooon17 жыл бұрын

    Could you do one with fine grained sand? Would be interesting to see if that is faster or slower than a liquid.

  • @S4ccryn

    @S4ccryn

    7 жыл бұрын

    Cameron Gregg an egg timer inside the tumbler is like a clock measuring measures

  • @stringmanipulator
    @stringmanipulator7 жыл бұрын

    loved it

  • @BillySugger1965
    @BillySugger19657 жыл бұрын

    Aw Bruce, do you know the pitch drop experiment? Imagine making one of these filled with pitch, setting it off for your great grandkids to still see on its first trip down the track!

  • @PaulKlinebanana
    @PaulKlinebanana7 жыл бұрын

    THAT'S A GREAT IDEA PLEASE DO ONE WITH HONEY

  • @fluevedpeisen9971

    @fluevedpeisen9971

    7 жыл бұрын

    YES, DO THE HONEY.

  • @alfredabbey6162

    @alfredabbey6162

    6 жыл бұрын

    Then eat the honey.

  • @TheWhiteKnightProd
    @TheWhiteKnightProd7 жыл бұрын

    You should make one of these with mercury in it. That'd be dope.

  • @concretenate8068
    @concretenate80687 жыл бұрын

    Very cool sir

  • @Metal-Possum
    @Metal-Possum7 жыл бұрын

    I used to make these out of paper and a marble as a child. I knew them as "magic jumping beans" as they rolled awkwardly down a slope, no funny rods or special track required.

  • @Y1EL
    @Y1EL7 жыл бұрын

    nice work

  • @amigi5001
    @amigi50017 жыл бұрын

    Nice Channel. New abo secured 👍🏻

  • @VanceWalkerNinjaWarrior
    @VanceWalkerNinjaWarrior6 жыл бұрын

    Your gaining subs fast

  • @martinwalters1954
    @martinwalters19547 жыл бұрын

    Now let's see one that climbs.

  • @LakeNipissing
    @LakeNipissing7 жыл бұрын

    3:27 . . . Try with Mercury, SG =13,6. That should move pretty fast!

  • @carmelpule6954
    @carmelpule69549 жыл бұрын

    Excellent fundamentals to teach with, how to change potential energy into an oscillatory motion.

  • @YeanyScience

    @YeanyScience

    9 жыл бұрын

    Carmel Pule' Thank you, I'm always hopeful that people see these ideas as more than just amusement.

  • @vortexwhirlz2181
    @vortexwhirlz21815 жыл бұрын

    Omg amazing I wanna be like u one day

  • @maxsnts
    @maxsnts7 жыл бұрын

    20 years later i realize that my physics teachers were crap. :(

  • @AndrewBoheler
    @AndrewBoheler6 жыл бұрын

    I can see plans here for the worlds most boring toy: a tumbler filled with pitch. Or, more optimistically, the worlds most interesting pitch-drop experiment. I wonder what the most efficient possible tumbler would look like? Smooth rotation down the slope, transferring the weight without jolting... I guess the closer to the ...center... the center of mass gets, the more like a simple wheel and axle it becomes. It would be interesting to see multi axis tumblers too.

  • @YeanyScience

    @YeanyScience

    6 жыл бұрын

    You raise some interesting questions here, however, I don't think I will try the pitch tumbler, I'd only get to see it turn over once or twice in my lifetime

  • @kevinbyrne4538
    @kevinbyrne45388 жыл бұрын

    You might consider a study of the toy "Fiddlesticks", which is just a rod with 2 spinning rings on it. Jearl Walker mentions it in his book "The Flying Circus of Physics".

  • @iceton8186
    @iceton81866 жыл бұрын

    nice way to mimic footsteps.

  • @petrarclanchann7973
    @petrarclanchann79737 жыл бұрын

    Bruce... try to make a honey day clock.

  • @lukemartin7029
    @lukemartin70296 жыл бұрын

    Neat video

  • @WILD4X4D
    @WILD4X4D7 жыл бұрын

    In accordance with using a more viscous fluid, could the tumbler toy be calibrated to make an accurate clock, i.e it takes an hour to make one rotation?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    it probably could if I had the track cut more accurately, such as a CNC machine. The imperfections in the current slots catch the axles and vary the time from one turn to the next

  • @WILD4X4D

    @WILD4X4D

    7 жыл бұрын

    Bruce Yeany so if I use thick sheet aluminum, cut with a CNC machine would that be a good basis, or should I computer accurately mill and machine all of the parts?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    Sorry Aden, I have no experience whatsoever with these machines. I pretty much work with wood for everything I make. you'll have to ask someone who knows more about it.

  • @WILD4X4D

    @WILD4X4D

    7 жыл бұрын

    Bruce Yeany well you know the science, and I work with these machines daily. If you don't mind I'll borrow your science and meld them with my skills. And I'll let you know. If you don't mind.

  • @bronylike2905

    @bronylike2905

    7 жыл бұрын

    Bruce Yeany if you use pitch, it would take until the end of time

  • @JohnDoe-ki6fm
    @JohnDoe-ki6fm7 жыл бұрын

    Cool. ;)

  • @magnussorensen2565
    @magnussorensen25657 жыл бұрын

    Interesting video. What about adding some kind of legs to each pair of peags so it can walk down a stair.

  • @Praxis4RageBaiting
    @Praxis4RageBaiting7 жыл бұрын

    can you please make a clock out of that toy?

  • @bubblezovlove7213
    @bubblezovlove72133 жыл бұрын

    But now I want to see the honey one! Make the honey one! The longer the delay is, the more interesting...

  • @artconnolly9519
    @artconnolly95197 жыл бұрын

    how about a perpetual motion machine. use the same toy but build a wheel instead of a ramp and have a slight brake on the wheel so it won't spin too free. I wonder if that would work ??? Maybe I'll have to try it.

  • @emeryshurpit8656

    @emeryshurpit8656

    6 жыл бұрын

    Art Connolly No form of that would work, conservation of energy always comes out on top

  • @sheadjohn
    @sheadjohn7 жыл бұрын

    it would be neat to put a motorized weight to make the tumbler go up the track

  • @supergub
    @supergub7 жыл бұрын

    It would be interesting to compare using sealed tubes partially filled with liquid, and one has atmospheric pressure wile the other is under vacuum.

  • @BuckeyeStormsProductions
    @BuckeyeStormsProductions7 жыл бұрын

    So, now I want to build one with a very viscous liquid (not sure about honey, though), and use it as a form of timekeeper. If you could find something which would take approximately an hour to tumble once, it could make an interesting clock.

  • @MrRyanroberson1
    @MrRyanroberson17 жыл бұрын

    With regards to honey: Time lapse idea?perhaps add a clock in the background for reference!also: Is it possible to make a light enough tumbler to use co2 vs. A lighter gas to tumble? (like the floating tin foil in a co2 filled fish tank experiment?)

  • @thucydides01984
    @thucydides019847 жыл бұрын

    Cute stuff. If you did fill it with honey, and it took all day, you could use it as a clock.

  • @madDragon08
    @madDragon087 жыл бұрын

    Is there a limit to the length of this tumbling stepper? Not the length of the staircase, but the length of the tube that the weight travels back and forth through. I would imagine at some point it would not achieve enough swing to restart the next step.

  • @JaredSloger
    @JaredSloger2 жыл бұрын

    I had a toy just like this as a child. The body was more of a pill shape with a drawing of a silly face on the front.

  • @NoStereo
    @NoStereo7 жыл бұрын

    Ha, that's the song Cox and crendor use.

  • @Rhin0Neil
    @Rhin0Neil7 жыл бұрын

    Do one with liquid but reduce the hole size to make a timer. Try to get it to do one hour total time from top to bottom.

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    that is a good idea

  • @jamescahn87
    @jamescahn877 жыл бұрын

    hey Bruce, has anyone ever tried to make one of these that would alloy the piece to actually CLIMB the track instead of tumble down it? That would make for a very interesting physics explanation also!!

  • @AlejandroInvestiga-wj1lg
    @AlejandroInvestiga-wj1lg9 жыл бұрын

    Amazing toy to awake the interest for the physics¡

  • @YeanyScience

    @YeanyScience

    9 жыл бұрын

    franco brizuela Hi Franco, this piece took several tries to get it working right. I especially like watching the part of the video in slow motion. It's movement is too fast to see the behavior of the tumbling toy but slowed down you can get a better understanding of it's physics. Thanks for your comments. Bruce

  • @AlejandroInvestiga-wj1lg

    @AlejandroInvestiga-wj1lg

    9 жыл бұрын

    Hi Bruce, yes even making good physics calculations it take many tries.

  • @Karpens16
    @Karpens167 жыл бұрын

    How about that drop experiment with pitch that takes years to drip. I'd like to see a tumbler with that stuff in it.

  • @alphasigmasezon8597
    @alphasigmasezon85977 жыл бұрын

    excelente

  • @lilome31
    @lilome318 жыл бұрын

    Been messing around with this contraption for a couple of days now. I am close but not quite. Might you have plans with dimensions?

  • @YeanyScience

    @YeanyScience

    8 жыл бұрын

    +Tim Halbert Hi Tim, I have some pictures from construction, give me an email and I'll send what I have.

  • @woodslore8537
    @woodslore85377 жыл бұрын

    you should try an hour glass shaped tumbler filled with sand just to see its rate of speed.

  • @nuvey7939
    @nuvey79397 жыл бұрын

    Bruce, it seems to me that I've seen one of these where it climbs the incline. I can speculate on the physics but I'm not certain they weren't just playing a video backwards. Any idea on how that would work?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    I've had a few people ask that and I don't know how it would be possible, gravity is pulling it down.

  • @nuvey7939

    @nuvey7939

    7 жыл бұрын

    Me as well. I was thinking an extra long tumbler with two or three smaller balls or something, but in the end, it could just have been a video played backwards.

  • @rishabhmayank

    @rishabhmayank

    7 жыл бұрын

    Nuvey It is a common science toy, we had one in our school too. the thing that climbs is like two cones stuck end to end like this and it is allowed to roll on tracks that converge instead of being parallel

  • @nuvey7939

    @nuvey7939

    7 жыл бұрын

    The one I saw looked like a modified version of this one. I know exactly how the other works. I had those in school. But this one flipped like the one in the video. The more and more I look, I get the feeling that someone uploaded a video of one of these playing backwards.

  • @NotaSuspiciousName
    @NotaSuspiciousName7 жыл бұрын

    the liquid one imagine how long it would take full of pitch XD

  • @alicom7501
    @alicom75017 жыл бұрын

    Wooooow

  • @carmeloortiz9159
    @carmeloortiz91597 жыл бұрын

    nice. but very nice... 😊

  • @Sausketo
    @Sausketo7 жыл бұрын

    intro: "Hi, sean here from speedcubereview"

  • @louiswouters71
    @louiswouters717 жыл бұрын

    Make a video of this with a water bottle that ends up perfectly straight on the table at the last spin. Call it water bottle flip science edition!

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    very funny, thanks

  • @Andrew-13579
    @Andrew-135793 жыл бұрын

    1..Can you make one that descends at a steady rate in a smooth, continuous motion? 2..Is it possible to make one that climbs up the track? Would have to have some form of input of energy to gain potential energy, I'd suppose. So my intuition would say no...but am I possibly wrong? :)

  • @microdesigns2000
    @microdesigns20007 жыл бұрын

    Oh, please please. Make one with honey! I'd liken to see one designed so well that it doesn't ever bounce, but moves fluidly. I wonder I could model this activity in Fusion 360. And... I wonder if one could be built with balloons where an air-filled balloon would have a helium filled balloon inside, causing the mechanism to climb up a ladder.

  • @KlaxontheImpailr
    @KlaxontheImpailr7 жыл бұрын

    If you think about it the liquid one is like the bb one.

  • @BrookNBones
    @BrookNBones7 жыл бұрын

    I'd love to see one made with mercury, I'm thinking it would move like the small balls do.

  • @oscarsmith3942
    @oscarsmith39427 жыл бұрын

    What would happen if you put a supercritical fluid in this?

  • @randomguy3281

    @randomguy3281

    7 жыл бұрын

    He needs to collab with Cody's Lab

  • @HokoraYinphine
    @HokoraYinphine7 жыл бұрын

    the beginning song sounds like the Let's Tap game i think it is :P

  • @jackreoh
    @jackreoh7 жыл бұрын

    maybe you should make a ever shaking hanging box

  • @70rodal
    @70rodal7 жыл бұрын

    My 5yr old son and I would like to ask you for a copy of how you made it and the materials. WE ENJOYED VERY MUCH WATCHING THE VIDEO.

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    THese are prototypes. There is a toy on the market of this piece but I couldn't find where to buy one so I estimated the sizes and then scaled it up. I made several changes as I was building it. I don't have exact scaled plans for it but I do have some pictures that may help, send me an email address and I will forward what I have

  • @70rodal

    @70rodal

    7 жыл бұрын

    Bruce Yeany. Thank you very much for replying. my email is mrwcc09@gmail.com

  • @flamencoprof
    @flamencoprof7 жыл бұрын

    It wouldn't hurt to state what principle/s of physics this demonstrates.

  • @RougeShadow199
    @RougeShadow1997 жыл бұрын

    If the slope or ladder continued for eternity down, would the toy ever stop?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    as long as it's going down it would keep going

  • @ColynBowman
    @ColynBowman7 жыл бұрын

    A toy called "Mighty Beanz" work using this same idea

  • @freshman2347
    @freshman23477 жыл бұрын

    try it with Honey inside! haha it would take 24 hours for sure

  • @devlinfisher9028
    @devlinfisher90285 жыл бұрын

    Someone should make a treadmill for this so it can fall forever.

  • @saturatedodin476
    @saturatedodin4767 жыл бұрын

    Fill it with mercury

  • @ThatGuy-vy3cp

    @ThatGuy-vy3cp

    7 жыл бұрын

    +RandomRoulette why stop there? fill it with a turtle

  • @alfredabbey6162

    @alfredabbey6162

    6 жыл бұрын

    Even better fill it with high explosive so you get a big surprise at the end.

  • @ryantexada9269
    @ryantexada92697 жыл бұрын

    mighty beans anyone?

  • @seandenby2304
    @seandenby23047 жыл бұрын

    can you imagine how long a liquid tumbling toy would take if you used pitch?

  • @samy4759
    @samy47599 жыл бұрын

    May i use this for my physics project?

  • @YeanyScience

    @YeanyScience

    9 жыл бұрын

    samuel yow Yes, it is my hope that people try some of the ideas in these videos. If you reply with your email address, I can send you more information on this piece.

  • @samy4759

    @samy4759

    9 жыл бұрын

    flamertem@gmail.com thanks! i need an explanation of how the toy works. Using the concept of energy, moments and force

  • @ariesniones9372

    @ariesniones9372

    8 жыл бұрын

    +Bruce Yeany (Yeany Science) can you send me the plans and measurements of your toy physics. at ariesniones7@gmail.com

  • @johnmerkley1167
    @johnmerkley11676 жыл бұрын

    Can you give me the specific measurements? I'd like to try it.

  • @YeanyScience

    @YeanyScience

    6 жыл бұрын

    hi John I have some basic information that will get you going, send me an email address to send it to

  • @TomBalazs

    @TomBalazs

    6 жыл бұрын

    Bruce Yeany Please send Tumble Toy details or plans to tom123online@gmail.com. I love your channel. Did you write that you have 38 years teaching experience? Wow! Keep up the great work.

  • @jessewilliams5160
    @jessewilliams51607 жыл бұрын

    Wouldn't it make it go faster if the pegs on the tumbler weren't staggered?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    Hi Jesse, I have a few additional designs to try on this, the problem is I have more things to try than time to work on them, but I will see if there is a way to change the pegs around, thanks -Bruce

  • @bradforsythe6256
    @bradforsythe62563 жыл бұрын

    What if you made a circular or semi-circular tumbler

  • @klobiforpresident2254
    @klobiforpresident22547 жыл бұрын

    I'd personally use a superfluid liquid in a vacuum tube, but I think that's out of the budget?

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    me too!

  • @Stormprobe
    @Stormprobe7 жыл бұрын

    Did you use mouthwash in the last one? You should add a defoaming agent with it.

  • @YeanyScience

    @YeanyScience

    7 жыл бұрын

    it was dish soap and water

  • @ug7563
    @ug75633 жыл бұрын

    Is a nice clock

  • @arnulfoacevedosoto7956
    @arnulfoacevedosoto79564 жыл бұрын

    Amigo que precio tienen los planos en PDF

  • @JasonCoulls
    @JasonCoulls6 жыл бұрын

    Here's an idea... Put a non-Newtonian substance in there... like silly putty. It'd probably take all week to go down, but it'd still work.

  • @asmoth360
    @asmoth3607 жыл бұрын

    You could actually put some sauce in the last one and let it mix itself.

  • @MikeM8891
    @MikeM88917 жыл бұрын

    Fill it with Mercury.

  • @oxo010
    @oxo0107 жыл бұрын

    I suspect that it wouldn't work with honey. I think the impact as the device hits the stand, and the resulting flinging of the ball bearing, or liquid, before the device stabilizes, is necessary to keeping it moving. With honey, or even with a ball bearing and different device dimensions, the device would stabilize, hanging from the top pins and with the bottom pins lifted from the stand. The device would stop moving, and the weight -- the honey or ball bearing -- would remain at the end of the device closest to the uphill end of the frame. It shouldn't be hard to test this theory.

  • @nordenconrad14yearsago45
    @nordenconrad14yearsago457 жыл бұрын

    what if you make a zig zag tumbler?

  • @gerardb.ducoudray8881
    @gerardb.ducoudray88816 жыл бұрын

    Do you share the planes?

  • @YeanyScience

    @YeanyScience

    6 жыл бұрын

    I don't have step by step plans but I have some pictures and information that can help, send me an email address and I will forward it

  • @martywildes472

    @martywildes472

    5 жыл бұрын

    Me too please! Woodart@mjdesigns.info

  • @MrCoolstopmotion
    @MrCoolstopmotion7 жыл бұрын

    Try mercury as a liquid inside the tumbling toy that would be very intresting

  • @rickkwitkoski1976

    @rickkwitkoski1976

    7 жыл бұрын

    Mercury is VERY TOXIC! The tumbler part, the way it is made in the video, would probably leak a bit of it. NOT GOOD!. And a sealed glass vial of it inside the tumbler still wouldn't be safe as it could break as well. The small ball bearings in the one tumbler is a good approximation of what mercury would look and act like.

  • @K0szk0

    @K0szk0

    7 жыл бұрын

    Many ppl do mercury videos on yt these days. If you're so paranoid about it then I wonder how you're going to react on that: /watch?v=GvVaaZ21C44

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