Personalized Band Rocks Youth T-Shirt. Band Rocks with three dancing rocks holding a trombone, flugelhorn and flute is a humorous music design for band geeks at birthdays and holidays. 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.