Every year, Spencer Organ tries to make something Christmassy to make his house more festive, and to show off at various events he attends. This year, he 3D-printed a plastic house and placed it inside a snow globe bell jar. Beneath the house, he added a Raspberry Pi Zero W with a Pimoroni Automation pHAT and Unicorn pHAT. He soldered everything up and then did some programming to connect the project to Twitter, allowing him to specify keywords to achieve different effects inside the house. You can read more from Spencer here, including how to build your own.