Review from GeekDad: ""The finished book is a thing of beauty; a tactile experience that will help teach your child the fundamentals of mechanics. There is a wealth of material available for future installments (the whole of science!) and Nathan Schreiber has a great knack for making his subject clear and engaging. I would definitely read more Science Ninja books.

The mechanics explained reads like any plan of action from a comic book caper. Schreiber has made physics exciting by letting his characters use it to escape from situations whenever they find themselves in peril."

LEARN STEM WITH NINJAS!

Three young heroes test their strength, mettle, and physics knowledge against a diabolical assortment of obstacles they can only solve with the clever application of simple machines - ramps, wedges, screws, levers, pulleys, wheels, and axles. Can they push past these puzzles and their own personal problems over six chapters - one for every simple machine - and prove themselves worthy Science Ninjas?

Along the way, readers 8 and up learn principles of force, work, mechanical advantage, and compound machines. There's even an illustrated appendix of experiments readers can do at home to build their own simple machines!

From the creator of the hit chemistry game Valence and edited by eight middle and high school science teachers, Big Trouble with Simple Machines packs a powerful understanding of physics into a thrilling scientific treasure hunt that will hit the spot for kids ages 8-12.

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