WINNER: The most creative use of the Firebase API
A microwave of things! We created a WiFi controlled microwave that runs off an Android app with crowdsourced cooking times. A user scans a barcode (or searches if no barcode is present), and is given a cooking time, which they can adjust to personal preference. The microwave automatically opens and the user deposits the food. After closing the door, the microwave cooking time is automatically set, and promptly opens the doors upon finishing.