Uses a worm drive for low gearing.

Experiment with different weights for varied acceleration..

A simple fun kit to make.

Lift arm demonstrates pulleys.

Chunky wheels and stylish design.

Discover how different rubber band lengths and thicknesses affect the trajectory..

Levers activate the gripping hand/pincer mechanism,.

Simple effective design, results can be altered by using different bands.

An alternative method of powering a land vehicle.

Includes a control box to activate the motion..

Uses a worm drive for low gearing.

Five syringes control all the movements typically found on an excavator..