Bring snacks and a water bottle to Walt Disney World. Snacks will make it so you won't have to spend extra money on expensive items in the park. If you have a water bottle, you can easily refill it at the water fountains.
Bring a small, hand held camera that's easy to carry with you throughout the parks. A camera case and extra batteries are also good to have on hand.
Any time of the year, sunscreen is essential. You'll be spending most of your time outside while you wander through the parks. Sunglasses will also be helpful, and they're small, not taking up much room.
A cell phone is needed especially if you're going with a large group of people. It will help when you're trying to get in touch with other people in your party. Two-way hand-held radios should also be brought if you don't have cell phones or can't get reception.
Even if you don't plan on buying anything in the park, always bring money. That way if you do decide to eat in the park or buy a souvenir, you don't have to go all the way back to the hotel or car to get money.
