Created by the BBC, micro:bits are tiny programmable computers, designed to make learning and teaching easy and fun!. Please refer to the official micro_bit site.
There are lots of cool things you can build using micro:bits! For the final two weeks of the workshop, you will complete a final project, which could be a game you build using Trinket, or something with a micro:bit. These are a couple examples of simple things you can build using the micro:bit.
UCL micro:bit resources (includes both tutorials and "Challenges" which you could use for your project)