Last year it was extremely hot (even though it was only late April). Comfy shoes are definitely a must, just dress comfortable! Take lots of money or good plastic because you'll see many things to buy. Take a good camera--you can take pictures unless there is a sign saying you can't take one--some of the displays do have that message. Plan on being patient, being in crowds and standing in lines at times. But everyone is really nice and it's a great place to go!