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Build your own chain reaction machines : how to make crazy contraptions using everyday stuff : creative kid-powered projects!
EBOOK
by Long, Paul
Published 2018
Published 2018
Other Formats:
BOOK
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Launchers, lobbers, and rockets engineer : make 20 awesome ballistic blasters with ordinary stuff
EBOOK
by Akiyama, Lance
Published 2018
Published 2018
Other Formats:
BOOK
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