This is an internet connected Christmas ornament that can be programmed to do different things over wifi. Just the bare PCB.

They use an ESP8266 to control LEDs and piezo speaker and all of the documentation including a video can be found on HackADay.io (Below). Its fully open source.

These are an early version of the boards that have a sleeping current of 8mA which means they will kill a AAA battery in about a day. I used them as gifts last year and they work great, even with the current draw, but the new version will have the fixed sleep current. I just told people to just put the battery in on Christmas day, instead of the two weeks before.