This is a fundamental building material for use in scratch-building or customizing models.
From the manufacturer:
This assembly kit creates a robot whose movement can be programmed by the use of cam parts. The dual motors power triangular tracks and left/right arms in unison. Cams are inserted into the central program bar, and as it is pushed through the model by the program bar gear, the position of the cams is translated to the steering legs, which are lifted off the surface and cause the robot's motion to change. Program bars give approximately 35 seconds of movement and can be joined together for longer patterns. Includes everything needed for easy snap-fit/screw-together assembly.
Test your skills by creating an obstacle course and programming the robot to successfully navigate it!