Mechanical

Make your own Stirling Engine (Hot Air Motor) with this kit. The pack contains all the materials needed to produce a fully functional hot air motor. This is NOT a clip together kit! All the most critical parts are prepared but there is a considerable amount of work to be carried out and you will require a few workshop tools. This kit was originally designed for pupils of 15+ but makes an excellent and satisfying project for any engineering enthusiast. (No soldering required) This motor uses a tea-light as the heat source.

Build a fully functioning Stirling Engine and run it for up to 60 minutes from a cup of your favourite hot beverage! Requiring a lower temperature differential than the engine above, the cardboard assembly kit contains everything you need to build this amazing machine including prepunched card pieces and all other components. Just add some glue and your own cup (or an ice-pack as this machine can also run from a "cold source") Safe for younger children as there are no candles or other flame heat sources
Watch it in action here!

A self-assembly kit that makes use of a spinning off-centre mass to produce interesting movements. Good, low cost and easy to build kit. Ideal teaching resource or great gift idea for children. Suitable for age 8+.

This kit includes a pair of converters that enable old CDs to be used as dragster wheels. Great fun. Suitable for age 9+.