Personalized Blast Off For 3rd Grade Youth T-Shirt. Get ready for grade school Youth T-Shirt - White with a rocket ship, planet and stars says BLASTING OFF FOR 3RD GRADE. Back to school gifts for 3rd graders and 3rd grade teachers. 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.