Personalized Oom-Pa Youth T-Shirt. Oom-Pa tuba playing dad is a humorous music design. Fun gifts for low brass playing fathers and grandfathers at Father's Day, 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.