If cockroaches send you scrambling, use neuroscience to reverse the human-insect power balance. Carefully electrifying the nerves in a roach's antennae makes the insect think it has met an obstacle—a sensation that can be manipulated to steer it. The trick could turn roaches into handy tools. Alper Bozkurt, an engineer at North Carolina State University, envisions a network of cyborg roaches assisting in search and rescue. Neuroscientists Greg Gage and Tim Marzullo, meanwhile, think hacking insects could inspire kids to research and improve electronic interfaces with the human nervous system. Gage and Marzullo developed a $100 RoboRoach kit that includes all the tech required for insect neurosurgery. But you can follow these steps to assemble a similar kit—and command your own troop of six-legged cyborgs—on the cheap.