micro: Circular RGB LED Expansion Board
The DFRobot micro:circular RGB LED board adds 24 bright RGB LEDs to your BBC micro:bit, along with a sound level detection microphone and buzzer. If you've got Gravity or Boson components, there are two interfaces included. Mounting holes allow different facades to be attached to the front for wearable or hanging projects. If you need to add standard neopixel/ZIP LEDs, check out this board, which has pin connectors rather than Boson/Gravity interfaces.