Personalized 3rd Birthday 3 Year Old alphabet Youth T-Shirt. 3rd Birthday Youth T-Shirt - Vintage Hot Pink has A B C look who's three third birthday quote and stacked alphabet blocks for a boy or girl turning 3 years old. 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.