The micro:bit (also known as the BBC Micro Bit) is another microcontroller that can power servos for Paper Mech projects. It was developed as part of a UK STEM education initiative.
A good place to start with micro:bit is the guide here. This tutorial uses a block-based language (similar to Scratch) in a web browser-based editor called MakeCode. Once you’ve set up your micro:bit, it is helpful to work through the short code tutorials here, beginning with “Flashing Heart”. These tutorials will step you through some of the basic functions of the micro:bit, including lighting up the built-in LEDs, programming the built-in buttons, and getting two micro:bits to send messages to each other. There are many other classroom-friendly sample projects at this website, as well as more advanced computer science and coding curricula.
If you would like to explore other hardware projects — such as reading a temperature sensor, using a piezo buzzer, etc. — here is a helpful series of tutorials by SparkFun. You may have to purchase additional electronics for the projects.
Here is an additional list of places where you can purchase micro:bits and accessories.
This instructional video shows how to set up a mini servo motor with the micro:bit. WARNING: the micro:bit can only output a very small amount of power to a mini servo motor. In order to power a stronger motor, you will need a different configuration (instructions coming soon).
Here is how to hook up a single mini servo motor to a micro:bit.