Obviously people have lots of perfectly legitimate reasons (working, new siblings etc) to start their children in nursery/pre-school at various ages, but I'm just interested to know what people think is the best age for the child, if there are absolutely no constraints? Reason I ask is that DS2 (aged 25 months) started at nursery this week, and it hasn't gone terribly well so far (see other thread) - it's not dreadful, but he's cried a fair bit and told me he's 'sad'. I'm a SAHM with no younger baby, so no need to send him yet - I just thought he would enjoy it, and am also keen to make sure he's ready in time for school (late August birthday, so he'll be going when he's just four). I'm now wondering whether I should just take him out and leave it for six months and try again. So - what do you think is the ideal age to start?