William Gurstelle

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Decorate Your Desk With This DIY Personal Sky Puppet

Decorate Your Desk With This DIY Personal Sky Puppet

I Defend My Backyard With A Bottle Bazooka

I Defend My Backyard With A Bottle Bazooka

Build A 300-MPH Ping-Pong Cannon

Build A 300-MPH Ping-Pong Cannon

How To Build A Ballistics Box That Measures Fastballs
A Mushroom Cloud Made From Coffee Creamer

A Mushroom Cloud Made From Coffee Creamer

How To Build A Roman Catapult In Your Backyard

How To Build A Roman Catapult In Your Backyard

Hurl Wiffle Balls At 50 MPH—With A Leaf Blower

Hurl Wiffle Balls At 50 MPH—With A Leaf Blower