Personalized 1st Grade Rocks Youth T-Shirt. Back to school Youth T-Shirt - White says 1ST GRADE ROCKS in colorful primary colors. Keepsake and photo op gifts for 1st graders first day of grade school or 1st 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.