Why Does a Ball Bounce?: 101 Questions You Never Thought of Asking 
The Imagineering Field Guide series answers the question "What would it be like to walk through a Disney park with an Imagineer by your side?" A lot of fun, actually! And extremely interesting. "The Imagineering Field Guide to Epcot at Walt Disney World--Updated! "provides that experience, explaining large concepts and pointing out subtle details, revealing stories, backstories, and Imagineering insights never before revealed; and showing the sketches, paintings, and schematics used to develop the look of each attraction--all condensed into a portable, easily referenced park guide. These user-friendly, beautifully illustrated guides are innovative and entertaining books that will enrich the guest's time at the happiest places on earth. And now the series is being updated to include all the new attractions, shows, and lands in the Disney parks. Who better to tour you around these Disney parks than the Imagineers who created them? And what better than to have the most recent insider information? It's all in the Imagineering Field Guides.
Whether playing at defending their own castle or simply chucking pumpkins over a fence, wannabe marauders and tinkerers will become fast acquainted with Ludgar, the War Wolf, Ill Neighbor, Cabulus, and the Wild Donkey--ancient artillery devices known commonly as catapults. Building these simple yet sophisticated machines introduces fundamentals of math and physics using levers, force, torsion, tension, and traction. Instructions and diagrams illustrate how to build seven authentic working model catapults, including an early Greek ballista, a Roman onager, and the apex of catapult technology, the English trebuchet. Additional projects include learning how to lash and make rope and how to construct and use a hand sling and a staff sling. The colorful history of siege warfare is explored through the stories of Alexander the Great and his battle of Tyre; Saladin, Richard the Lionheart, and the Third Crusade; pirate-turned-soldier John Crabbe and his ship-mounted catapults; and Edward I of England and his battle against the Scots at Stirling Castle.
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