We're taking our 2 & 9 year old great-nieces to UO & IOA for one day next February. The 9 yo is a huge Harry Potter fan. I'm pretty well versed on Disney World, but I'm not quite as up on the Universal parks. I'm looking for ideas to make this part of the trip special - something to do or see Harry Potter related that's age appropriate. Are there any "secret" or little known things that aren't well advertised, or special treats that have to be asked for, or anything like that? I do know about the unmarked interactive windows - I plan to get her a wand & show her those. Anybody have any ideas?