One day is doable / warning: you kiddo will want to shop! I couldn't really figure out why my son wanted to hit the stores so badly, but there is so much to SEE in the stores it's phenomenal. Merchandise of course but detail after detail. Constellations on ceilings. Movie props. Cool and quirky details. Weasley's Wizarding Wheezes alone is just over the top accurate. Plan to be doing this between rides and sips of Butterbeer, it's totally part of the experience! People wear wizard robes, too, so buy that in advance or bring it... we waited until the second day to get one (very pricey at the park!) and it just added to the fun. We also brought a pair of Harry specs from a Halloween costume and lots of people commented (never saw these to buy). By the end of the two day trip, my son could identify every character's wand and whom it belonged to because he studied them before deciding what to bring home as a souvenir for his sister (next budding HP fan in the house!). If your son is a huge fan, I recommend Shutterbuttons. It's a photo/video experience you can do by acting out short scenes on a green screen. Then you get a cd with moving 'wizard/style' photos. So cool and a great keepsake... someone told us about it and I planned on it otherwise I might not have done it. I usually purchase Photopass at WDW, so this is what I did at Universal instead of getting their ride photo package! Have an amazing time! I can't wait to go again (yeah... I'm a HP fan too, read all the books when my son did!).
