May the 4th be with you (2018).
Here is the link to the footage of the prank that we did using this Yoda head:
https://blog.freddythunder.com/hacked-star-wars-yoda-head-for-prank-at-work/
Introduction of a Star Wars Yoda Talker toy head that I hacked with a raspberry pi to reprogram the things that Yoda says. The story revolves around a friend at work who had one on his desk. We swapped out his Yoda head for the hacked Yoda head so it can make fun of him as a prank.
I replaced the electronics with a raspberry pi zero w, motor control board, audio amplifier, audio filter and a ton of patience. I programmed a web interface in python to control Yoda through a wifi connection.