They sell bundles of mickey lollipops, you could buy a few of them and break the bundles up, sheets of stickers, little more expensive but you could purchase a Disney Dollar for each child, take a pad of plain paper and have characters write each childs name and autograph them for you(not the same characte-that would be too much to ask-but ask for two from each character you see), depending on how many days you're there and how many children are in your class---collect the complimentary soaps/shampoos/lotions and hand them out to the class. Also you could get a souvenir penny for each child. You could even purchase a bag of Mickey Pretzels and give each child some!