Extreme Kits (www.extkits.co.uk) is a supplier of Electronic, Acrylic and high voltage kits. All of our kits are constructed and packaged in house.
Currently we have a range of Solenoid engines. From a simple single solenoid engine (https://extkits.co.uk/product/solenoid-engine-single-v2-standalone/), a twin solenoid engine (https://extkits.co.uk/product/solenoid-engine-twin/) and a beam engine (https://extkits.co.uk/product/beam-engine-solenoid-engine/).
We also do a Van de Graaff Generator Kit (https://extkits.co.uk/product/mini-van-de-graaff-generator/) and the new product (that will be available for Liverpool) Is a Wimshurst Generator Kit (https://extkits.co.uk/product/mini-wimshurst/)
All of our kits are safe for kids (over the age of 5) and are intended to inspire them to build and learn for themselves. Of course, kids come in all ages.
Many of the kits have come from projects featured on the Extreme Electronics web site, That web site is dedicated to high voltage and is a hobby site. It is important for safety (and my sanity) to keep the two separate.