Personalized 2nd Birthday 2 Year Old Girl Unicorn T-Shirt. This cute two year old birthday design has hearts, balloons and unicorn for a little girl turning 2 Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.