Just seen this anger management tool in action: a simple plastic jar with water, food colouring and glitter! The [3yo] boy felt angry, found his jar, shook it and visibly calmed down as he watched the swirling glitter!
The Anger Box. Box filled with for example: a feeling wheel, emotion cards, squishy things, bubbles, pin wheel, beeds and string, newspaper to tear... whatever might help a kid manage his emotions. GREAT idea.