From learn.adafruit.com - October 28, 2018 5:21 AM

MAKECODE EDUCATORS CIRCUIT PLAYGROUND / EXPRESS
Overview by Kathy Ceceri
Looking for a way to get kids designing and building their own simple robots? With just a Circuit Playground Express (CPX), a servo motor, and a few household materials, anyone can create a Cardboard Inchworm that meets the "sense-think-act" definition of a robot! Here's how: