Thispocket edition ofRubber Band Engineer is easy to take with you, so you canbuild slingshot-powered rockets, catapults, improviseddarts, orcrossbows wherever you go.

Only requiring householdtools such as paper clips, pencils, and popsicle sticks (and naturally copious amounts of rubber bands), this book is your master's course on getting your doctorate in rubber band-age.

Dimensions: 21.1 x 16.3 x 1.8 cm (8.3″ x 6.4″ x 0.7″)

Weight: 362.9 g (12.8 oz)