Science Demonstrations

We have been building a wide variety of science demonstrations since about 2000, originally for CHaOS (Cambridge Hands On Science), and our own shows but more recently for Lab in a Lorry, The Naked Scientists shows, the Cambridge Science Centre, the RI christmas lectures and others.
Having done a huge amount of loading experiments in and out of vans we have now become obsessed with making experiments pack as efficiently as possible, preferably into a standard box or if that is not possible, then as a clean flat object which will pack nicely.

The fire tornado is one of the most beautiful science demos, a combination of hot air floating, and the conservation of angular momentum produce a beautiful spinning column of flame.
One favorite experiment is the Gherkinator, essentially electrocuting a gherkin to produce sparks which glow due to the salt they are soaked in.