Dana Anderson, optical physicist and professor of physics at Å·ÃÀ¿Ú±¬ÊÓƵ-Boulder, will explain the marvels of light and lasers to local children at the next Å·ÃÀ¿Ú±¬ÊÓƵ Wizards show, "Fantastic Light," on campus on Saturday, May 29. The free presentation, at 9:30 a.m. in the Duane Physics building, room G-030, is designed for children in grades five through nine. Reservations are not required.