Informed by an ever-growing body of developmental research, classes at The Music Class introduce tots to tunes and concepts that boost creativity and listening skills. In Music Pups (a $72 value) courses, children under 4 years of age gleefully sing, dance, and bang away on rudimentary instruments such as the drums or theremin. Four and 5-year-olds learn concepts of tone and rhythm in the Music Cats course (a $77 value), which lets kids experiment with keyboards before defending their dissertations on the narrative redundancies of "Old MacDonald Had a Farm." Each 45-minute course meets four times in one month-long segment, and includes CDs for parents to play at home to follow up on in-class tutelage. This Groupon may also be used toward The Music Class' ten-week music courses.