A.W.
hi! i read the others' posts, and so i know i am reiterating their advice, but the things that occurred to me were- hewants more of your attention, and as hard as it is, i find with my daughter that even though i want to discipline her for acting out, what she really needs and responds to is love- a comforting voice tone, maybe some comforting toys, and if she'll let me, a hug or holding for awhile. also i would say really check his diet. my first thought was sugar, in all refined forms, even fruit juice raises blood sugar really quick, and then of course, they crash. my daughter is really sensitive, just like me, and when she crashes she is like a different person. we don't really eat artificial colors and stuff, but i'm sure pp is right about those as well.
hope this helps, peace!
ali