- 1 Set 3D printed parts - 1 Set Paper templates Download them from my website: https://www.niklasroy.com/windmill - 1 Piece Hand crank music box / This will make the music! - 1 Sheet 3mm thick sheet material(e.g. Forex, Alu-Dibond or Coroplast) / For base plate and windmill blades - 1 Piece Hard sheet material (e.g. a cutting board) / Used as resonator - 1 Piece Driving belt (worst case a long household rubberband will do the job) / Connects windmill rotor with music box - 1 Piece 4mm diameter steel rod (18cm long) / Used as axle for the rotor - 2 Pieces Ball bearings 26mm outside diameter, 10mm inside diameter, 8mm thick / Used for the rotor - 2 Pieces Ball bearings 13mm outside diameter, 4mm inside diameter, 5mm thick / Used to mount the base plate - 5 Pieces Short M3 screws (e.g. 10mm) / Used as set screws for the pulleys & to fix the music box on the resonator - 2 Pieces 20mm long M3 screws & nuts / Used as set screws for the rotor parts - 4 Pieces Short M3 screws (e.g. 7mm) / Used to fix the music box on the resonator - 4 Pieces Long M3 screws (e.g. 40mm) / Used to fix the resonator on the base plate - 12 Pieces M3 nuts & washers / Used to fix the resonator on the base plate - 14 Pieces M4 x 20mm screws & nuts / Used to fix the wings on the rotor and the bearing mounts on the base plate - 1 Piece M10 threaded rod (70cm - 1m) / Used to hold the windmill - 4 Pieces M10 nuts / Used to lock the windmill on the threaded rod