Yeah its normal and yes they do grow out of it.

I went through a stage where I would have to put my legs over DD's legs to keep her still while I changed her nappy. That was doing my head in so I went and brought her a special cup and she got to have it every time we changed her nappy (with just water or milk in it). She would be concentrating on that for 20 seconds which was ample time to get a new nappy on. Apart from that I was pretty strern with her. WOuld say "No DD, you need to stay still while mummy changes your nappy" etc.

Thank god the phase doesnt last long.