Personalized Unicorn Christmas Toddler T-Shirt. Unicorn Christmas - A cute little unicorn wearing a Santa hat uses some unicorn magic to make a sparkling Christmas tree with rainbow decorations. 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.