Personalized 2nd Birthday Unicorn Rainbow Toddler T-Shirt. A pink unicorn surrounded by a colorful rainbow, next to a sunny yellow 2. Cute gift for the birthday girl's 2nd bday! 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.