Robot builds its own body from sprayable foam - tech - 19 October 2011 - New Scientist

Robot builds its own body from sprayable foam: Created by Shai Revzen and colleagues at the University of Pennsylvania Foambot consists of a wheeled "mothership" platform along with several simple joint modules capable of powered bending and flexing. The platform has an on-board supply of chemical reagents and a spray nozzle; when mixed, the reagents expand into hard urethane foam. First the remote-controlled platform arranges the modules on the floor and then it sprays the foam to connect them into the required form.