You'll need the following materials to build the cosmic ray detector:
- Scissors
- Black heavy felt
- Clean, empty glass jar with a rubber washer or cardboard filler under the lid
- Ruler
- Rubber cement
- Rubbing alcohol
- Two towels
- Pie tin
- Rubber gloves
- Block of dry ice (enough to fill pie tin)
- Hammer
- Ice tongs
- Flashlight
- Three books (preferably not valuable, as masking tape will be used on them)
- Masking tape
- Small magnet
