Need toys? Why visit a colossal chain store that practically requires a map to navigate (we're talking three aisles just for Barbie's shoes) when there's a cool little place like the Explorer Store? The shop, located in the Museum of Discovery & Science, sells all sorts of creative games, toys, and gadgets designed to provide challenging fun. The Build Your Own Volcano kit ($15) helps kids create actual eruptions using baking soda and vinegar. Another kit teaches children to build clocks out of vegetables. Then there's the always-popular Make Your Own Slime kit. "Kids really love that kind of thing because it's green, messy, and gross," says the store's Carol Villaverde. "And because they get to eat it." Speaking of which, the astronaut ice cream ($2.50) is rather tasty; it comes freeze-fried in a foil pouch, in napoleon and ice cream-sandwich flavors. You'll also find sea monkeys (actually brine shrimp), stuffed manatees and sea turtles, dinosaurs, books, puzzles, and the like. The shop, located across from the atrium at the museum's entrance, also sells toys that complement whatever IMAX film is showing at the time, as well as DVDs and videos of the film. The Explorer Store sees about 300 kids a day, all visiting on school field trips. But why should your child have to wait until then?