My lo tends to get up after I put him back down to kip at about 7, he then gets tired around 9 - 9.30, has a nap for half hour, stays awake until 12ish, has between half hour to hour then usually stays awake till 3.30 and sometimes again sleeps for half hour/hour (if an hour I have to wake him to feed at 4.30) He then stays awake till bed time (wind down begins approx 6.45 he is getting grouchy by this time!) I can tell he is sleepy by his rubbing of his eyes and also he begins a little cry. He can be hard to put down for his naps but usually get him off to sleep within 10 minutes.