To test your skills keeping your hand steady, you need 2 size D batteries in a plastic battery holder with terminals, an E10 lamp holder and bulb, (1) 30-inch piece of bare copper wire, (3) 10-inch pieces of #22 insulated copper bell wire with stripped ends, a cardboard shoe box lid and masking tape.
Bend the 30-inch piece of bare wire into a curly line. Make a small loop at one end of a10-inch piece of insulated wire, and thread it onto the curly wire. Poke a small hole in each end of the top of the lid, and insert the ends of the curly wire. Bend one end of the curly wire to the side, and tape in place. Connect the other end of the curly wire to a piece of insulated wire by wrapping them together two times, and tape in place. Connect the remaining end of the insulated wire to a terminal on the lamp holder. Connect another piece of insulated wire to the remaining lamp holder terminal, and then to one terminal on the battery holder. Connect the remaining end of the looped wire to the remaining battery holder terminal. Try to move the loop along the curly wire without it touching the curly wire. If you touch the curly wire, a complete circuit is made, and the bulb will light up. You can make more bends and twists to increase the challenge.
You need six large, juicy lemons, (6) 4-inch lengths of bare copper wire, (6) 2-inch galvanized nails, an LED (light-emitting diode), (7) 12-inch lengths of wire with attached alligator clips and waxed paper.
Roll the lemons on a table to make them juicy and place them on waxed paper. Put a piece of bare wire and a nail on opposite sides of each lemon. Connect the nail to the flat spot (-) side of the LED with an alligator clip wire. Connect the bare wire, with an alligator clip wire, to the other side of the LED (+). Does the LED light up? Continue adding lemons one at a time until the LED lights up. Ask your audience to guess how many lemons it will take.
For this guessing game, you will need an E10 lamp holder with bulb, a lantern battery, (3) 9-inch pieces of insulated copper bell wire with ends stripped and various objects to test for conductivity, such as an aluminum screw, iron nail, or a small plastic item.
Connect the first wire between the positive (+) battery terminal, and the lamp holder base. Attach a second wire to the open lamp holder base terminal. Connect the third wire to the negative (-) battery terminal. Ask the audience to guess which items are conductors. Touch the two open wires to the various objects, one at a time. If the bulb lights up, the object conducts electricity and completes the circuit.
For a quiz game, you need a pre-made simple circuit with an E10 lamp holder and bulb, a 9-inch piece of insulated #22 copper bell wire with ends stripped, tag board, a paper punch, aluminum foil and electrical tape.
Prepare two columns, one with questions, and the other with matching answers in mixed order, leaving a 1 ¼-inch border on each side. Punch a hole next to each question and answer in the border areas. On the back of the board, place a strip of foil linking each question with its answer. The foil should show through the punched holes. Cover each piece of foil with electrical tape. Open the connection between the positive battery terminal and the bulb. Attach the 9-inch wire to the empty bulb terminal. Use the ends of the loose wires to match questions and answers. The bulb will light if the player is correct.