![Wacky Contraptions: Gadgets That Whiz, Whoosh, Whirl, and Twist with Hands-On Engineering Activities (Build It Yourself) [Paperback] Perdew, Laura and Rauch, Micah](http://textbooks.mrsnelsons.com/cdn/shop/files/full-192419-71jvDS4-nQL.jpg?v=1778708030&width=1946)
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Wacky Contraptions: Gadgets That Whiz, Whoosh, Whirl, and Twist with Hands-On Engineering Activities (Build It Yourself) [Paperback] Perdew, Laura and Rauch, Micah
Wacky Contraptions: Gadgets That Whiz, Whoosh, Whirl, and Twist with Hands-On Engineering Activities (Build It Yourself) [Paperback] Perdew, Laura and Rauch, Micah
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