The Servo Kit for micro:bit makes it easy to connect up three servomotors from your micro:bit. Not only that, but the kit also comes with three servomotors and a battery box. Just add a micro:bit and batteries and away you go!
Please note, BBC micro:bit and batteries are NOT INCLUDED
The kit includes the following parts and a downloadable instruction guide.
For a getting started guide to the Servo for micro:bit board see its product page.