Personalized Straightening Up Toddler T-Shirt. Orthodontist, straightening up, one tooth at a time text with a row of teeth is a humorous dental design for birthdays and holidays. 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.