when were home for the morning hes up at 8am, will not sleep at 12.30 when i put him and his sister whos 3 down for his nap. she still sleeps till 2pm and bedtime is 8pm but this past 3 or 4 days hes lying singing and kicking his legs and dosent seem to want to sleep. when were out and about he still falls asleep in the car? what should i do? thanks