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

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

Levers activate the gripping hand/pincer mechanism,.

Rocker switch to isolate the battery.

A simple fun kit to make.

Use a series of gears.

Chunky wheels and stylish design.

Lever and pivots to give a parallel lift.

Does most things, except fly!.

We recommend zinc batteries only..

This simple arch bridge has amazing strength.

Enabled by the use of cams and levers..