Personalized Big Sis Alligator Girls Sister Announcement Toddler T-Shirt. Give the new Sister in your family a cute alligator Toddler T-Shirt - White and Black sibling gift with Big Sis slogan. 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.