This is a rhyme with a nice, strong rhythm. Once through boldly, actions as described
Roly poly, roly poly up, up up.
Roly poly, roly poly down, down,down.
Roly poly, roly poly clap, clap, clap.
Roly poly, roly poly hands behind your back.
Sh!
Repeat at a whisper, then…loudly:
Roly poly!