Re: what catrionlee just said:

They constantly bang there heads on anything they can find anyway. A cot bumper isn't going to stop them bumping their bits - usually their heads!!

Funniest thing at the moment is Daniel sitting at the glass sliding door (v thick glass, mind you) watching the dogs outside and he sneezes. He forehead goes "bump" against the glass - doesn't cry, just giggles - weirdo.