Quantity   Component name
1 × Easy Home folding step stool This one's from ALDI, but they're everywhere
1 × Adafruit ItsyBitsy M0 Express https://www.adafruit.com/product/3727
4 × 35mm arcade button with LED (red, yellow, blue, green) https://www.amazon.com/gp/product/B07CH2SZ9R/
1 × USB cable Electronic Components / Misc. Electronic Components
4 × 330Ω resistors for the LEDs
1 × filament for the hinge locks and the carhop tray