Neither of mine have, though now DS1 is nearly four and we don't necessarily want him to sleep in the day he will just fall asleep watching TV or plonk himself on the floor and go to sleep. But DS2, nearly six weeks, seems to need a lot of help to go to sleep and cries if he gets tired. Is this everyone else's experience and is "they'll sleep as much as they need to" just a load of rubbish?