Learn how pulleys can be used to transfer force with reduced friction and how to increase force or speed at amazing levels. Build five working models including an oil drill, stationary bike, cranes, bridges ,and a machine blender. A 36 page activity book is included with innovative experiments and detailed explanation of the different technological principles applied. Reccomended ages 8 and up.
WARNING: Choking Hazard - Small parts..Not for children under 3 years.