To do it right, crouch down and touch your toes. You watch me do it, then you try. You watch me do it, then it's your turn. Flap your arms like a bird. Now you do it.
Nobody does the flap and the monsters say nothing.
First you watch me do it, then you give it a whirl. Music picks up. The monsters will be able to copy if you do the moves, but don't be sloppy. Kid on the green rug does a crouch. Kid on the green rug does some flaps.