I wish I knew... seems that Oskar, who is 4, has picked up pushing from somewhere... not really sure where? He says it's because at kindy "everyone pushes me"... well, obviously not everyone, but in his eyes it is. I have told kindy the reason he told me he pushed a couple of others so they're more aware of it now. I don't know, cos we don't push each other and he doesn't have other siblings who do either.