Quantity   Component name
3 × High Speed DC hobby motors Usually a dollor or two apiece
3 × 1" Round Glass Mirrors From hobby store
3 × 1" round wood discs, 1/8" thick from hobby store
2 × 100 Ohm potentiometer, 2 Watt, 10 turn wirewound
1 × 100 Ohm Potentiometer, 2 watt, 1 turn
1 × SPST Switch
1 × Project Box - 4" x 4" x 4"
1 × 1/8" plywood (or plexiglass) squares
1 × LASER pointer (any color) high power = better
1 × Paint Stripper (Aircraft) from Auto parts store
1 × Small can Acetone
1 × Epoxy - 5 minute