T.C.
I agree with the response below about telling them it's rest time until the first number is 7. My kids are early too, but this works for us (before they were creeping earlier and earlier- it got to be common that they were ready for their day at 4:30!). We tell them they can come out to use the potty, but other than that they need to stay quietly in their rooms. It works great for us. They don't always sleep later, but they do leave us alone and it stops being a battle because they know it isn't going to get them anywhere to come out earlier- it took about a week or two the when we started of reminding them and putting them back (I think it helps that I'm not very fun that early in the morning so their rooms seem better than me until I have a chance to wake up and get myself up). Good luck