The LEGO Technic Idea Book: Simple Machines: Isogawa, Yoshihito: 9781593272777: Amazon.com: Books
The LEGO Technic Idea Books Inspire Enthusiasts to Design, Invent, and Build--New Series from No Starch Press: Three-Volume, Four-Color, LEGO Picture Book Series
LEGO® Technic Great Ball Contraption Tutorial #1 - LEGO® Technic™ Videos - LEGO.com for kids
LEGO Gravity Rollers: A Fun Contraption That Propels Itself! - Frugal Fun For Boys and Girls
The LEGO Technic Idea Book: Fantastic Contraptions: Isogawa, Yoshihito: 9781593272791: Amazon.com: Books
The LEGO MINDSTORMS Robot Inventor Idea Book by Yoshihito Isogawa: 9781718501775 | PenguinRandomHouse.com: Books
LEGO Technic Idea Book: Fantastic Contraptions | No Starch Press | 9781593272791