James "Ancient" Brown's design is a small circuit board with an RP2040 microcontroller. This computer is connected to a miniature OLED screen. James put the whole thing into miniature mould. He filled the mould with transparent resin and a small LEGO brick was created. Power comes from the contacts at the bottom, similar to the LEGO motors. In the attached video you can see how the game Doom works in such a brick (this game probably works on everything).
