I just recently read about this project.
https://www.eecs.harvard.edu/ssr/projects/progSA/kilobot.html
The researchers built 1024 robots to learn about how members of a group interact to accomplish a common goal. The robots are small and simple. It looks like a lot of fun to me. They supply a lot of information in the link I gave above. All the way from buying you own Kilobots to building them yourself.
https://www.eecs.harvard.edu/ssr/projects/progSA/kilobot.html
The researchers built 1024 robots to learn about how members of a group interact to accomplish a common goal. The robots are small and simple. It looks like a lot of fun to me. They supply a lot of information in the link I gave above. All the way from buying you own Kilobots to building them yourself.