connecting a neopixel strip and arcade button to an Elecfreaks Cutebot
https://www.elecfreaks.com/micro-bit-smart-cutebot.html
lots of neopixel options
this one is https://www.adafruit.com/product/3812
arcade button (also many options for amount and size)
https://www.amazon.com/gp/product/B01MS1GZ5J
https://makecode.microbit.org/