I have Googled this and the internet seems to say that children should have a daytime nap till they are 3 or 4. My mother says that I had a good 2 hours till I was 4 
Anyway, DD is only just 2 but she only seems to nap every third day or so - the rest of the time she just won't drop off and I don't like to waste the day trying to force her. She gets quite grumpy and tired before bedtime though - so is it a problem? Does she still really need one or will she get used to whole day without?
Thanks!