Thanks for all the suggestions! I'll try some of them out and see how we go.

I do use praise whenever he stays still for a second but he just doesn't seem to get it LOL. But I will persist, I guess consistency is the key here!

Mel, yep he does have a couple of toys that I give him during nappy changes but now half the time they get defiantly thrown across the room and I therefore refuse to give them back to him for a while LOL.