Jason Mitchell, left, and Joshua Varner, right, make adjustments to Zeno, a robot boy creation by David Hanson at the Hanson Robotics office in Richardson, Texas, Thursday, Sept. 6, 2007. At 17 inches tall and weighing 6 lbs, the artificial Zeno is the culmination of five years of work by Hanson and a small group of engineers, designers and programmers at Hanson Robotics. (AP Photo/Tony Gutierrez)