I have a nephew, 3 yrs old, who is much like you describe your son. Except i know why he's such a terror. His parents don't believe in teaching him boundaries. I'm not saying that's the case with you, just wanted to say that even tho we love him to bits, he drives us all nuts with his constant need for attention (even negative attention is good enough) and his destructive behaviour... I can only imagine what it must feel like to be the mother in this scenario... I'm sorry that I have no advice or probable solution. XOXO