Autor: Bobby Mercer, 3 titluri

The Flying Machine Book: Build and Launch 35 Rockets, Gliders, Helicopters, Boomerangs, and More, Paperback

Bobby Mercer

Junk Drawer Chemistry: 50 Awesome Experiments That Don't Cost a Thing, Paperback/Bobby Mercer

Bobby Mercer

Junk Drawer Geometry: 50 Awesome Activities That Don't Cost a Thing, Paperback/Bobby Mercer

Bobby Mercer