As the song goes, "Ain't nothin' like the real thing." If you're doing a dino-party, you really can't beat the ambience of celebrating amid actual dinosaurs. Consider the price regularly paid to set up moonwalks and hire magicians and hungover clowns. Then consider cleaning it all up off a suburban lawn. Think about it too long and you're likely to have an anxiety attack. Calm down. Take deep breaths. Rent out the Houston Museum of Natural Science paleontology hall instead. Comparatively, it's a reasonable expense. For $1,500, the birthday boy or girl and friends can enjoy cake and punch in the presence of ceratopsian (a.k.a. triceratops), a giant pterosaur and the infamous T. Rex. Guests are free to explore the exhibits on the first floor, but special parties do not include the perk of flaunting the "do not touch" rules. Want more structure? Space Mission parties in the Challenger Learning Center start at $200. Up to 20 children (with a couple of helpers per child) can enjoy a mission during museum hours.