Personalized 3rd Birthday Rocket Youth T-Shirt. Blast off into a happy third birthday with a red rocket, shooting stars, and astronaut celebrating the three year old's 3rd birthday! 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.