I learned this song from the composer, Dr. Joanne Rutkowski way back in grad school at Penn State. I have been teaching it to my kindergarten students from pretty much day 1 of my career and it is always one of their top favorites. They love being super strict and getting a stern face and scolding each other!
We sing the song three times when we do it. First out load - then silently, in our head - and finally out loud again.
Hope you and your students enjoy it :)