Personalized 4th Birthday Unicorn Party 4 Year Old Girl Toddler T-Shirt. This cute unicorn face is perfect for a little girl celebrating her fourth birthday. 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.