Personalized 3rd Birthday Train 3 Year Old Girl Youth T-Shirt. 3rd Birthday Youth T-Shirt - White choo choo train design has number 3 and flowers and bows for a girl turning three 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.