Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

Find out how you can change a circuit by adding items like switches with this Bitesize 2nd level science animation and a fun activity.

"You can build circuits straight on to paper, even in a spiral notebook," says Jie Qi, a member of the High-Low Tech Group at the Media Lab. Here she explains how to draw your connections.

Designed for switching applications in telecommunications, instrumentation, medical equipment, workstations and computer peripherals, the C&K 7000 series rocker switch comes in ...