For HackMIT during Fall 2017, my friends and I built a Harry-Potter-inspired sorting hat that asks you questions to assign you to a MIT dorm. We placed in the top 10 and won the Best IOT Prize. See 1, 2.

We placed servo motors inside the hat so it moves. It also grumbled when not used.

We also put the hat on a stool, which we put on a tabletop, so that it could obnoxiously be the most visible project in the gymnasium.

Unfortunately, I don't have a video of the hat in action :(

“(...), while others applied tech in an innovative way, making a real-life Harry-Potter-themed sorting hat, or (...)” - Brown CS Blog describing HackMIT 2017