Personalized Castle 1st Birthday Princess Youth T-Shirt. 1st birthday ONE YEAR OLD PRINCESS Youth T-Shirt - White with sweet pink and green castle, big number 1 and funny frog prince. 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.