Disney World?

Yay for you guys! You're going to have a blast! Magic Kingdom is a great place. It really isn't worth to dine in Cinderella's Castle...they used to allow kids there but I'm not sure if they still do so it's okay to p it up. The girls would probably love a visit to the Bibbity-Boppity Boutique where they can get dolled up like Princesses. Obviously you have to hit the rides. There's a Mickey's Playhouse area for younger kids with age appropriate rides and activities. The younger ones may get freaked out by the Characters in costumes (just a warning). Definitely take your cameras, hats, sunscreen, and an umbrella just in case cause our weather guys aren't always correct. Swimwear as well and if you want to save some money pack some of your own drinks and snacks. I'd take a backpack and not one of those fanny pack things btw LOL. Animal Kingdom, Epcot, and MGM are really all about shows and not so much on rides. The shows are great for everyone too and a good way to cool-down and rest! Best of luck and hope you have a great time!