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Raintree Publishers
Why things don't work: helicopter
When Annie arrives at her cousin's farm, she finds the helicopter she wants to fly doesn't work. In fact, it's in pieces! Luckily, her cousin, Ed, is on hand to help rebuild it. Join them in their quest to rebuild the helicopter, and along the way discover the science of the machine and what makes it work. This book is written in comic book format and pictures show how machines work.
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