Look: You see one book. Flip it over: Now you've got two. They're giant, they're fun, they're two volumes in one From math and mazes to science and word searches, these great collections offer a big bang for the buck and hundreds of cool puzzles and games to keep you busy for hours. Math and science go together like milk and cookies, and that's what makes this double book a treat: it has both, in one cool volume filled with eye-opening, mind-expanding, kid-pleasing fun, is math magic? It sure is, with pleasing fun, is math magic? It sure is, with these delightful tricks and games. Do some calculator conjuring. Put on an amazing show with Arithmetricks. Solve math logic puzzles, and even predict which card will be chosen from a deck of cards with some fancy figuring. In the kitchen, out in nature, anywhere at all, junior scientists can create extraordinary experiments using only ordinary materials. Every one is simple, yet teaches important scientific principles: taste electricity with a lemon, make a water trombone with a straw, use a bit of butter to tell which bulb is brighter, and more.