My first DS (aged 3 months) generally sleeps well at night, but is a bit of a nightmare during the day. I've recently started putting him down for proper naps, as before he was only catnapping on my lap, which meant I got nothing done, and I thought the time had probably come to teach him to sleep properly. He's very bad at falling asleep on his own, and he often needs a dummy or some white noise to help him. But even once he's deeply asleep, he wakes up without fail after 20-30 mins of sleep. I can then get him to go back to sleep again, but he'll wake up again 20 mins later. After this has happened once or twice, he's then too upset to get back to sleep. It's definitely not that he doesn't need the sleep - he spends quite a lot of the day being very crotchety and apparently overtired. One possibility is that he's waking up because he's missing his dummy - but a) he doesn't always use one, and b) why wouldn't he wake up at night in the same way?? Does anyone have any ideas??