check out www.familyfun.com
also check dollar stores for some simple magic tricks.......
balls under cups, linking rings, bunnies in a hat
Serve Magic Kook-aid this is clear Kool aid and the kids don't know what flavor it is until they drink it, I tell them its magic water.
you can always get Harry Potter's Jelly Belly beans..... you know the ones that are flavored like ear wax and grass and such wierd flavors
Pretzel rods dipped in a bit of chocoltate could be "magic wands" milk chocolate to make it brown then white chocolate for the tip.