Taught 28 Year 5 children how to use a micro:bit to predict the future. Or, more specifically, how to create a variable that stores a random number, and then create a confirmation or denial message conditionally based on the value of that number (yes / no / maybe, etc).

The class wrote letters of thanks afterwards and said things like "Just how did you fit so much fun into one lesson?"; "It was really satisfying how the code clicked into place" and "When we played with them, they acted like they were alive."