Penny-Powered Flashlight
WHAT WILL YOU MAKE?
Power a flashlight with pennies so you can signal Spider-Man when you’re in need! No store-bought batteries necessary. Build the flashlight with an LED and a few other household supplies, and make your own power source with coins and cardboard.
Materials:
- 7 pennies, made in 1983 or later
- Scrap cardboard, about 6" square
- Paper towels
- Paper or plastic cup
- Vinegar
- Duct tape, 5" piece
- LED, red
- Medium- or fine-grit sandpaper
- Scissors
- Pencil
- Safety glasses
