Eddy's a science geek and has problems communicating with others. The combination gives the class bully, who pretends to be Eddy's friend, plenty of ammunition. Eddy Thomas can read a college physics book, but he can't read the emotions on the faces of his classmates. He can spend hours tinkering with an invention, but he can't stand more than a few minutes in a noisy crowd, like the crowd at the science fair, which Eddy fails to win. When the local school crossing guard is laid off, Eddy is haunted by thoughts of the potentially disastrous consequences and invents a traffic-calming device, using parts he has scavenged from discarded machines. By trusting his real friends, Eddy uses his talents to help others and rethinks his purely mechanical definition of success.