The Soccer Robots
... robots built for the RoboCup Junior Competitions
The RoboCup Junior Competitions
The RoboCup Junior Competitions
Four soccer robots that were built for the RoboCup Junior (link to Wikipedia)
I built these with two of my classmates back in high school. They are all custom-made by hand, everything from mechanical components to electronics. They were programmed in MCS-51 assembler. It was before "Arduino" was a thing.