Build a Circuit Baby Check out this link. It’s fun. Start by opening the link. You will see a diagram of an electrical circuit. Click on “run now.” Then start building. All you have to do is click and drag. Please build the following: 1) A simple circuit. Use one switch, One light, and wire to build a circuit. 2) Now try with two switches, two lights, and wire. When you’re done try the grab bag. Which of the objects are conductors and which are insulators?