In tech, we have been making switches that can actually light up a light bulb! We have used tin-foil and cardboard for the main parts. The tin-foil is conductive so we can use it to light the bulb. We have used these switches to play a self driving card game. When you draw a red card from a pile, you have to light up a certain light bulb. The goal is to be the fastest person to get through the deck.