My son of 5 with SPD is mind set on tormenting his 13 yr old sister daily. While they are off school it is even worse.
Today has been the worst so far, he is constantly talking, shouting, screaming at me for attention and if he doesn't get it instantly it gets louder and he throws himself on the floor, kicking anything that he can. He is constantly in motion some of it dangerously. He has been taking it out on his sister. He runs in and out of her bedroom, hides her things, this morning was her glasses and she couldn't find them. She wears them all day. He hits her, pushes her and stands on her. If you tell him off he puts his hands over his ears, cos he dislikes noises but he makes more noise than anyone I know. He also smirks when you tell him off and says ok. Then proceeds to do it again.

Any suggestions on dealing with this would be appreciated.