Joe, why not take a simple drum track from one of BiaB's styles, save either wavs or MP3s of it at various tempos and have the children clap to the beat? Or buy some inexpensive tambourines for them to use:

https://www.dhgate.com/wholesale/tambourines+kids.html


Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware