Did somebody say "single jointed arm?"
From 2005 onward, there have only been 2 years that our robot did not feature an arm.
This is our 2011 robot:
https://www.chiefdelphi.com/media/photos/36687
And our similar 2007 robot:
https://www.chiefdelphi.com/media/photos/27675
Both used a dual chain reduction off of a fisher-price motor.
The design is often imitated (along with the tower structure of our 2005 robot), and it's not uncommon to find look-alikes. (especially in 2011, when an arm made a lot of sense)