Consider this the mecca of playtime for ages 2 and up. Known for its high-quality play yard products and sports equipment, Superior Play Systems opens up its huge showroom, featuring basketball hoops, trampolines, and swing sets, to up to 16 kids per party. The sheer amount of things to jump on, play with, and run around keeps the teeny partiers happy while moms and dads can sit back and watch the show. $199 (weekday), $249 (weekend) for up to 16 children.