Anyone who's ever arranged and hosted a kiddie birthday party knows that keeping the little urchins together in one location is about as easy as corralling cats. Hopped up on cake and Kool-Aid, the kids quickly break ranks and head out of sight in about ten different directions. If you've got a group of five-year-olds, it's unnerving -- which is why the Magic House is the perfect party place. Parents can reserve special party rooms for pint-size birthday bashes -- rooms that serve as jumbo playpens (or cages). Within those confines, the kids are offered age-appropriate games, arts and crafts, and science demonstrations and experiments. Once the kids have burned off some energy, bolder parents can walk them around the exhibits.