This is one of my favourite lessons with the Micro:BIT as you are just taking a whole lot of small bits of code, connecting them to the different buttons on the Micro:BIT and making a device - the Gizmo. If you want to take it further you can create the housing for the Gismo, turn it into wearable technology or make it into a badge that you are going to use in class or at a conference.
Note - Gizmo can be replaced with Whatsit or Gadget or Doohicky or Thingamajig or (_add your own family name for the thing that was helpful, but had no real name_).