Keeping them up later to get them extra tired will acutally make it MORE likely that they will wake easily in the night.
Overtired kids' bodies are flooded with adrenaline. How soundly will you sleep after being mugged? Not very. Same problem for them. The more exhausted they are, the harder time they will have fallling asleep, staying asleep, and the earlier they will wake in the morning. To say nothing of how rotten they will feel and behave all day long.
What to do?
Make certain they stay in their room at night - baby gates, door alarms, etc. A young child roaming loose in the house at night is dangerous... two is too much! Put in a baby monitor so you can hear them playing and can intervene. If necessary, put a little potty in their room and tell them they have to use it at night - no roaming in the house.
Good luck and I hope it's a phase that passes soon.
at 12:24 AM on Feb. 11, 2009