Personalized Music Rocks Youth T-Shirt. Music Rocks text with three musical rocks holding a trombone, violin and guitar is a humorous gift design for music lovers at birthdays, holidays and back to school. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.