The Invention Hunters Discover How Machines Work

Author/Contributor(s):	Briggs, Korwin
Publisher:	Little, Brown Books for Young Readers
Date:	07/09/2019
Binding:	Hardcover
Condition:	NEW

"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"--