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Robot invasion

David Hernandez Jr., 11, from left, Kevin Perez, 10, and Ernesto Estrada, 9, find the necessary pieces shown on an assembly diagram to build a robot Tuesday at the Willmar Public Library. A presentation on robotics was offered Tuesday at the Willmar Public Library as a partnership between 4-H and the library. Participants learned about the history of robots and how they can help us in our lives. They then put together their own robots and programmed them to do simple tasks. Tribune photo by Ron Adams