№ 1 · you build it
Make a light come on
Press the button and the red light comes on.
- 1Tap the battery, then tap the resistor.
- 2Tap the resistor, then the red light.
- 3Tap the red light, then the button — and the button, then the battery.
What to look for: Hold the button down and the red light glows. Let go and it goes dark.