DS is 15mo. He's on one nap per day since the last two months, sleeps 11-12 hours at night usually and is awake between 6 and 6.30 in the morning. I have been putting him down for his nap around 12.30 and he'll sleep 1-2 hours. In the last week he's been putting up a royal fight about going for his nap, and by the time I've managed to actually convince him to sleep he's well over-tired and sleeps for about 30 mins! DD had very different sleep needs and he's always needed less than her - am I putting him down too early or too late, or is he just having a phase?! thanks