My son is 2 and a half and has two older siblings, DD4 and DS6. If I leave the room he pounces all over them, climbs the furniture, rips glasses of DS face, pulls DD hair, throws toys. jumps, wrestles them, destroys whatever they are playing with. I can't take any more. They can't bring any of their toys downstairs as he throws them over the stairgate into the kitchen constantly. He is constantly shutting doors, gates etc.
He is the same when I'm in the room to except for the furniture climbing.
Any suggestion welcome please ASAP!!!