“This short video introduces the amp:bit, the easiest way to hook up a set of headphones or speakers to your BBC micro:bit. Simply plug the micro:bit into the amp:bit and then plug-in your headphones! alternatively you can solder a PC speaker directly to the provided pads or solder a screw terminal. The amp:bit also features a built-in volume control!”
I will have to go out and buy a BBC micro:bit first!