Music in Motion

That motion is the gentle rocking of a boat for this series of family neighborhood concerts presented by Bargemusic, the floating barge at the foot of the Brooklyn Bridge. As always, the material — announced just before the performance — is chamber music, but these programs differ in important ways from the regular Bargemusic fare: With unreserved seating, they last only an hour, include a post-show question-and-answer session with the musicians and are all free.