Personalized Big Sis Unicorn Girls Sister Announcement Toddler T-Shirt. Cute little unicorn for announcing a new baby will join the family or the biggest sister in the family comes on a Toddler T-Shirt - Heather and Royal. 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.