Personalized Music Notes and Shamrocks Youth T-Shirt. A jumble of shamrocks and music notes is a fun gift design for the Irish and the Irish at heart on St. Patrick's Day and at Celtic festivals. 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.