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Lance Dragon Defends His Castle with Simple Machines

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Lance Dragon Defends His Castle with Simple Machines - Braun, Eric, and Ohmann, Paul, Dr. (Consultant editor)
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Hey, dudes! Skateboarding is my thing, but when barbarians invade my castle, I have to defend myself. Watch me launch a water balloon with a lever and lower a key with a pulley. Roll with me and find out how simple machines simply rock!

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Lance Dragon Defends His Castle with Simple Machines 2012, Picture Window Books, North Mankato

ISBN-13: 9781404877085

Trade paperback

Lance Dragon Defends His Castle with Simple Machines 2012, Picture Window Books, North Mankato

ISBN-13: 9781404873728

Hardcover