In the Czech Center's unusual exhibition, mounted in conjunction with MoMA's upcoming "Century of the Child" exhibit, artists and children play and interact with a series of installations, collaborating to create new experiences with sound, visuals and motion. Participants can throw marbles into a huge system of tubes, alter the sounds coming out of a speaker using special handle, or play some music with a special “harp chair” while others sit on it and feel the vibrations. A series of free workshops for all ages will be offered throughout the summer months, encouraging children and grown-ups alike to play with their art. Check the website for details. Free. Ages 3 and up.