A great series of books-- Feet are not for kicking, Hands are not for hitting, Teeth are not for biting(can't remember author name). I've used these to talk about specific agressive bx with 2, 3, and 4 yr olds in group and individually. Gives the positive things we do with our feet, our hands and our teeth and gives a def. "no!" for using them aggressively toward others. Not really in depth enough for older children. I hope this is helpful.