OK very trivial thread. DS(2) is driving me nuts by undoing his sleeping bag! During the day, he takes it off, then throws everything - toys, water, bag - out of the cot, then jumps up and down, yelling Mummy, Mummy and singing. Or he undoes his nappy, so I can't just ignore him. This carries on for about 3/4 hr or longer, until he drops from exhaustion. I know he is tired because he doesn't do it for the nanny, he just does it for the joy of me coming in at two minute intervals to do it up again. At nighttime he is tired, so he just undoes the bag, then goes to sleep, so I have to go in and do it back up again when he is asleep. I am wondering whether to switch to a duvet - presumably this is OK at his age? Or will he just throw the duvet off as well? How many of you have your 2-yr olds in a sleeping bag?