We recommend zinc batteries only..

Simple cost effective model for hours of fun.

The wooden launch pad is only part that requires making.

Uses a rubber band to drive both sets of wheels.

Geared motor for extra power.

Does most things, except fly!.

Geared motor for extra power.

Uses a worm drive for low gearing.

Battery, motor and propeller provide artificial wind to drive the power station.

Basic robust model.

Lift arm demonstrates pulleys.