Matt Torrance of Libertyville explains to the participants of a Machine Masters class what the gears do while building the LEGO Walker robot. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Eleven-year-old Andy Merrill of Libertyville (center,) and 10-year-old Jayel Versoca of Gurnee watch their instructor Matt Torrance of Libertyville as he shows them the LEGO® Walker robot that they will be building and then putting through a series of tests. The Robot Factory in Libertyville offers classes in lego building, problem solving using basic engineering and robot building. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Ten-year-old Jayel Versoca of Gurnee checks the stop watch held by his robot-building partner, eleven-year-old Andy Merrill of Libertyville while they check how long it takes their LEGO® Walker robot to walk a distance on a flat surface.| Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 A participant in Machine Masters Level 2 class starts out on building the LEGO® Walker robot. The Robot Factory in Libertyville offers classes in lego building, problem solving using basic engineering and robot building. There are three levels of robot building, starting with ages seven years and up, a class for nine-year-olds and up and then an advanced class offered for kids 11-years-old and up. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Ten-year-old Tyler Grazian of Grayslake gets to work on building his part of the LEGO® Walker robot during Machine Masters class at the Robot Factory in Libertyville. Participants of the class were split into groups of two, each member assigned to build a half of the robot and then put it together for a series of test runs. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Ten-year-old Tyler Grazian of Grayslake watches as his partner, 11-year-old Tyler Kuklas of Libertyille, takes a video of their completed LEGO® Walker robot with his smartphone. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Nine-year-old Ethan Duty of Lake Villa digs around for a part used in building the LEGO® Walker robot, while his partner (left,) seven-year-old Jack Merrill of Libertyville, works on building his half of the robot during the Machine Masters class at The Robot Factory in Libertyville. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Instructor Matt Torrance of LIbertyville explains what tests participants of the Machine Masters class will have their LEGO® Walker robot complete. The completed robots were tested walking first on a straight flat surface and then tested again on a slope. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Brothers four-year-old Austin Waltz and 10-year-old Christian Voelkev test out an alligator robot with a sensor in it's mouth. The robot is one of the robots that is built in a robot building class offered at The Robot Factory in Libertyville. Three levels of robot building are offered as well as classes in lego building. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 Participants in the Machine Master level 2 class work on building a LEGO® The Walker robot at the The Robot Factory in Libertyville. | Michelle LaVigne~Sun-Times Media

LIBERTYVILLE Wednesday Apr 25 2012 A completed LEGO® Walker robot is put through it's series of timed tests by a participant in the Machine Masters class at The Robot Factory in Libertyville.| Michelle LaVigne~Sun-Times Media