How do you deal with a 3-4yo who refuses to sleep early? (9pm) and sleeps only closer to 11pm? I'm thinking of making my LO exercise until she KO. Heh.

follow a routine and gradually they will be adjusted to the schedule. Reading of storybooks and avoid playing games and lots of excitment whereby the kids will still feel alert. make the envirnoment suitable to sleep with dim lights and I will diffuse with soothing scents for them.