The Invention Hunters discover how machines work

"When the Invention Hunters, a group of globe-trotting invention collectors, visit a construction site in their flying museum, a boy helps them by explaining how simple machines like levers, pulleys, and cranks work"--

Main Author: Briggs, Korwin (Author)
Format: Books Print Book
Language: English
Published: New York ; Boston : Little, Brown and Company, 2019.
Edition: First edition.
Series: Invention Hunters ; 1.
Subjects:

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