M-Blocks Modular Robots

These proof-of-concept robots are the first step in a project that will hopefully lead to the development of modular robot blocks that are cable of generic lattice-based self-reconfiguration. This current generation of robots is limited to being able to "roll" in only one direction per cube, and is remote controlled. Future work will hopefully add the ability for a single robot to move in all three planes.
Read More:
"M-Blocks: Momentum-driven, Magnetic Modular Robots"
John W. Romanishin, Kyle Gilpin and Daniela Rus
in IROS 2013