Junk drawer engineering : 25 construction challenges that don't cost a thing
by Mercer, Bobby, 1961- (Author)
Summary
"Children love challenges, especially ones that involve hands-on experimentation and friendly competition. Can they build a bridge using only pasta and glue, one that a toy car can drive both under and over, and is sturdy enough to carry a considerable weight? Can they construct a "roller coaster" f... Full description
Series: Junk drawer science
Junk drawer engineering: 25 construction challenges that don't cost a thing
Junk drawer geometry: 50 awesome activities that don't cost a thing