Quantity   Component name
2 × Raspberry Pi Pico
1 × 16x16 WS2812B LED matrix
5 × LED rings of decreasing diameter, we used: 45LED, 35LED, 24LED, 16LED, 8LED
1 × something to base your LED rings tree on, we used a paper cup, and cardboard together with hot glue
1 × for better effects: some nice diffuser, we used cloth grocery bags that were available at the spot
1 × some wire or better yet JST 3-pin connectors