This plasma ball is ideal for the science fan and to decorate a bedroom. It reacts to touch and creates harmless flashes of lightning bolts of electricity within the 15 cm diameter glass ball. It has an on/off switch with an audio setting – so you can use your voice or music to make the plasma react inside the ball. It comes with a 12 page full colour booklet explaining static electricity and electricity in nature together with 5 experiments on static electricity that are explained step by step. Comes with a UK mains adapter. Suits ages 14 years +.