In July when we last went, DD was 3. I planned 2 outfits per day with extra underwear and 2 bathing suits. FYI...If you have room in a bag take a change of clothes with you (it can be the smallest outfit you have and stay in the bag the whole trip) because you never know when your little one will get soaked in a fountain while you shop. I was shopping, DH was on Test Track, and DD was with MIL... she looked like a drowned rat and we had a dinner reservation to get to. I had to go back into the store and find a "cheap" outfit for her to put on.