This time not my experimentation but by a colleague and student I was supervising.
Some interesting work has been developed by Narinder Singh (MSc Computing student and Technician) in the Department of Computing and Immersive Technology, University of Northampton. The work revolves around investigating the use of relatively simple robots, kilobots, to investigate swarm robotics.
The kilobots (http://www.k-team.com/mobile-robotics-products/kilobot) are relatively low-cost devices specifically designed for work of swarm/collective intelligence experiments.
For more examples go to: Kilobot videoss
Supervisor Scott Turner
opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with.