With Micro Bit, I have made custom code for a Bit Bot,
aka, Boss Bot, and a watch.
Setting up: Turn watch on as soon as the real life minute changes. Press b until the hour is the same as it really is and then press a until the minute is correct as well. Once you set up the watch it will tell the time until it is turned off. You can change between 24 hour time and 12 hour time by shaking the micro bit.That is about it. (sorry no pictures)
You drive the bot using a & b.The bot has 2 settings: fast mode and normal mode.
pictures & videos.