Kids are fascinated with the way things work. This wooden model that has been handcrafted from durable hardwood with smooth-moving parts allows children to explore the concepts of force, speed, motion, direction, and energy.
The screw, another of the simple machines, coverts a circular motion (the turning of the scrw) into a linear motion. It also lets you amplify the force a great deal, since turning the screw only moves the end of the screw a small amount.
L: 7.50" W: 3.75" H: 5.25"