I have sailed the Epic twice and really enjoyed our time onboard...your kids will love the pool deck for sure,and also the Blue Man Group.
If you decide to opt for some alternative [pay] dining, that, along with your entertaiment options for times and days, will open up like 45 days before you cruise....not sure if I am remembering the time frame correctly. At that point you select where and when you want to eat and be entertained. You also pay at this point too...days and times most likely can be changed onboard if you change your mind.
Trip, with her book & tea!
Chat Hostess & Board Moderator