Kids can have sloppy fun at KiDiMu’s Messy Monday program Kids can stop by for special art projects on Messy Monday, Dec. 23 and 30 at Kids Discovery Museum. December 22, 2013 2:29 pm Kids can stop by for special art projects on Messy Monday, Dec. 23 and 30 at Kids Discovery Museum. Messy experimentation and sensory exploration are not only allowed but also encouraged. Drop by any time between 10:30 and 11:30 a.m.