We are often asked to make a specific exhibit, demonstration or other object. We have been commissioned by science centres, historical museums, university and corporate outreach, TV companies, and private individuals. If you have something you want building contact us.

Most space rockets are launched from the equator. Why is this?
A pair of trolleys with very low friction, so you can throw fuel one way and the trolley will go in the other - a rocket.
A mass spectrometer separates ions by their mass. This an analogy using ball bearings and a magnet.