Quantity   Component name
1 × a door, obviously as my daugther just pointed out
74 × 3mm lasercutted plywood custom design to fit a 300x600mm Lasercutter bed. Any non transparent material will work, we used something called MDF in german
350 × full color LED with controller WS2811B
350 × capacitors smd type 1206
1 × Arduino nano any microcontroller board will do. (atmega, if adafruits neopixel ibrary should be usable)
20 × meter of 1mm silver coated copper wire more or less, didn't keep track of that
35 × meter of 0.5 mm silver coated copper wire more or less, didn't keep track of that
1 × selfmade controller just some push buttons and some wirering. Look at sisams cube project for more advanced ones
1 × power supply we use a old PC psu so far