A Robot To Follow "Mother" And Another To Block Her

fireflash writes: "Some folks at MIT have had a bit of fun with robots. 'Mr. Mallard' and 'Roboguard' are robots that follow a homing beacon and guard hallways, respectively. Wouldn't you like to be followed around by a mess of wires and boards whilst attempting to pass through a hallway guarded by another? Sounds like the ultimate in home security to me :-)."