Please help me! My almost 4 year old son is still very aggressive. I thought that by now he would have grown out of it, but he hasn't. At pro-k his teachers tell me he seems very angry. My son is part of a very loving family...and no violent or excessive cartoon time. I've tried the 1,2,3 Magic system and it did work, but how long should it take a preschooler to realize that he can't hit, scratch, push, scream or kick?