iRobot's $200 Create 2 was designed as a teaching tool.
It was built on a Roomba 600-series platform.
That way, it retains the design and maneuvering capabilities of a Roomba.
Interestingly, though, it doesn't have any of the Roomba's vacuuming capabilities.
The Create 2 is a "blank slate," made specifically for students interested in robotics programming.
This provides students with a hands-on opportunity to develop skills in the areas of science, technology, engineering and math.