Personalized 1st Day of Preschool Back to School Toddler T-Shirt. Cute 1st day of Pre-K preschool design for kids. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.