Here is a cool example of the many variations you can do with ottoky. we used the legs as robotic arm and controlled the head with the in-built Gamepad. I am sharing the code here. Feel free to adapt it to your own liking!

https://youtu.be/UZzLZ2V3ToU

Oh, and this youtube video shows you how to assemble the whole thing!

https://www.youtube.com/watch?v=wM9VavBuHWE