Mercer, Bobby

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PREMIUM

Junk Drawer Geometry: 50 Awesome Activities That Don't Cost a Thing

      
PREMIUM

Junk Drawer Engineering: 25 Construction Challenges That Don't Cost a Thing

      
PREMIUM

The Robot Book: Build & Control 20 Electric Gizmos, Moving Machines, and Hacked Toys

      
PREMIUM

Junk Drawer Physics: 50 Awesome Experiments That Don't Cost a Thing

      
PREMIUM

The Flying Machine Book

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