LED Light Strips (12v - cut every 3 lights): https://amzn.to/3jx9BMz

Arduino Pixel Board: https://amzn.to/2WNKECZ

Capacitors for Lights

A kit with many types: https://amzn.to/30xEVCm

The ones we use for 12v neopixels: https://amzn.to/2ZOlkib (we buy them individually, but you can find kits like this on Amazon)

You can find the wiring diagram we always use here: https://learn.adafruit.com/adafruit-neopixel-uberguide/basic-connections

Single LED with Multiple Colors

With a controller (Neopixel): https://amzn.to/3hsdFfy

Without a controller (wire and control yourself, not recommended): https://amzn.to/2OMFy5B

Arcade Switches (the ones we like)

Round: https://amzn.to/3hsCwQk

Square: https://amzn.to/3hkUaVY

Light Valves

Light Valve: https://amzn.to/2ZQEfZG

Also available from Adafruit: https://shop.smarttint.com/SAMPLE-TEST-KITS_c_308.html

Christmas Light

These can be cut and are individually addressable with Neopixel libraries: https://amzn.to/2D2fArZ

These are the kind I talked about that cannot be cut and have several parallel runs (not usually recommended): https://amzn.to/2OOzxFy