Rubber Band Engineer: All-Ballistic Pocket Edition: From a Slingshot Rifle to a Mousetrap Catapult, Build...
Rubber Band Engineer: All-Ballistic Pocket Edition is a fun-filled book of backyard projects that's perfect for gifting.
Shooting far, flying high, and delivering way more exciting results than expected are the goals of the gadgets in Rubber Band Engineer: All-Ballistic Pocket Edition. Discover unexpected ways to turn common materials into crafty...
