Personalized Tuba Geek Youth T-Shirt. Tuba Geek Music Youth T-Shirt - White is fun for the whole tuba section in marching band or concert band. You'll love this funny tuba music slogan. 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.