Naps: This can be a time of transition for napping. If your child gets a lot of nighttime sleep and does well during the day, he probably does not need a nap. On the other hand, if he has frequent melt downs or conks out regularly when in the car, that afternoon nap is probably still needed. Too ong of naps can also greatly inhibit falling asleep at night. As a general rule there should be at least four hours between the end of the nap and the bedtime.