Our daughter was able to "wake" Tinkerbell on one of our trips. The Cast members gave her a wand and had her tap it on Tink's box and say wake up Tink. After that there is fiber optics that are throughout the store that give the effect of Tinkerbell flying through the store. Our daughter was presented with a certificate and given a few stickers. She did this during the 100 years celebration and I am sure that they will have something planned for the 50 Years celebration as well.
Just a thought that worked for us, we didn't tell our daughter about waking Tinkerbell just in case she had already been woke by another child, that way there wasn't any big disappointment.