We made electrical quizzes in groups. When the correct answers were matched the bulb lit. We swapped each group quiz-(bia, mountains, county towns, plurals, fractions) and tested them.
We made electrical circuits. When the circuit was complete, the bulb lit. When we added an extra bulb to the circuit the bulbs were dimer. When we added an extra battery to the circuit, the bulbs were brighter. We added switches to our circuits. The circuit was complete when the switch was closed.