Quantity   Component name
3 × Large pushbutton with a LED 3 different colors
1 × 2mm sheet of acrylic for laser-cutting the box
1 × 2xAA battery holder with the batteries
1 × 4-digit 7-degment display
1 × Arduino Pro Mini 3.3V
1 × Power switch
1 × Microswitch
20 × Acrylic nuts and bolts
2 × AA 1.5V Alkaline Battery