Hi Julia!
This is a fabulous idea! In fact, this is usually one of the top recommendations that we make to parents of young children. Whether you allow your kids to nap in the stroller or head back to the hotel, naptime shouldn't be ignored! Trust me, the last thing that you want is cranky kids when you are trying to spend magical family time together. Of course, you know your own children best, but mine usually need some sort of break in the day. I'll be the first to admit that I love a good nap as well!!!
Not only can you leave and return back to the park, but you can do it as many times as you wish! Of course, unless you have the Park-Hopper option, you may only return to the park that you spent the morning in. Don't worry, your park ticket will not be charged another day's use when you re-enter the park. For even more
great tips on traveling with small children, have fun checking out the ideas on the offical Disney World website. Have a great vacation with your little ones!
Much pixie dust,
Jackie S.