I will be in Niagara Falls from 6/26-6/30 and plan to purchase the Discovery Pass. I see that if I order it online i will recieve a free gift when i redeem it at the park? Does anyone know what the free gift is??? Should i order it online or just in person when i get there ( i plan to break the activities up and not do them all in one day). The first day I plan to do the movie and the aquarium, the second day cave of the winds and maid of the mist. I don't know about the Discovery Center, as it doesn't have good reviews.