His idea was simple—take a simple toy train, and put it on the Internet of Things. The train set sourced for the build was a 43 piece set with a locomotive, one carriage, and a simple oval track, retailing for $25. The toy train got a new brain in the form of an ESP32-C3 DevKitM-1, with the goal of commanding the device over Wi-Fi for ease of use. The ESP32 simply listens for commands via Matter protocol, and turns the train on and off as instructed. Toy trains aren’t something we typically see included in smart homes, but maybe they should be.