I did a little embedded project for the 2022 Arduino Cloud Games.

I took a “dumb” wooden box with a glass lid and made it regulate its own temperature.

The full project write-up, code, and build instructions are available here: https://create.arduino.cc/projecthub/bosepchuk/smart-plant-incubator-ce802d

Disclosure: I received a free Arduino Oplà IoT Kit from Arduino to participate in this contest.