Quantity   Component name
1 × Circuit Playground https://www.adafruit.com/product/3333
1 × Alligator Clips https://www.adafruit.com/product/1008
1 × LED Matrix https://www.adafruit.com/product/2547
1 × Power Supply: Mean Well RS-50-5 https://www.digikey.com/product-detail/en/mean-well-usa-inc/RS-50-5/1866-4157-ND/7706192
1 × Power supply cable https://www.digikey.com/product-detail/en/qualtek/311007-01/Q106-ND/183390
1 × Or Alternate / smaller LED matrix https://www.adafruit.com/product/1487
1 × Or Alternate alligator clips to match the small matrix https://www.adafruit.com/product/3255
1 × Or use this free, alternate online FastLED matrix simulator https://editor.soulmatelights.com/welcome