In honor of Martin Luther King Jr., the Cleveland Museum of Art is open today to host Let Freedom Ring, an event that features special activities in the galleries, art stories, hands-on art projects and live music in the atrium. The museum’s Art Cart will also be there, featuring authentic works of art that can you can actually handle and examine. Today’s event is free, open to all ages and runs from 11 a.m. to 4 p.m. (Trenholme)