Fun with shadow puppets! You can do these with kids of all ages. I did them with two and three year olds. While the cognitive ability to figure out the idea of the shadow, etc, was very different, everyone still had fun doing them.
Fire-Breathing Dragon: Deep Breathing for Kids. Click through photo for instructions on how to make the dragon. Students blow through the hole and practice the deep breathing calming technique until the breathing slows and the dragon is calm.