• Illustrate the principle behind the operation of a simple machine.
• Learn basic physics principals in a direct, hands-on fashion.
• Model contains a detailed activity guide which includes the history of the model, practical applications and classroom experiments.
• Handcrafted from replenishable and durable rubber wood, an eco-friendly sustainable and high quality hardwood.

The screw, another of the simple machines, converts a circular motion (the turning of the screw) 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. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized.