Personalized Kindergarten Rocks Long Sleeve T-Shirt. Back to school Long Sleeve T-Shirt - White says KINDERGARTEN ROCKS in colorful primary colors. Keepsake and photo op gifts for kindergartners first day of school or kindergarten teachers. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL