On Sunday, the Grammy award winning Muir String Quartet will perform at a benefit for Classical Music by the Sea in North Hampton. Proceeds will benefit The Classics for Kids Foundation, which helps to provide school music programs throughout the United States with quality stringed instruments. The benefit begins with an afternoon reception followed by the concert at 6. Before the concert starts, the Muir String Quartet will host an open rehearsal session for students, parents and teachers in the Winnacunnet High Schoolauditorium from 3-4:30. For more information visit the cmbythesea.com