Personalized Little Elf 1st Birthday Toddler T-Shirt. Toddler T-Shirt - Purple for a little elf's 1st birthday with a polka dotted number one and snowy striped North Pole sign. Perfect for Santa's helper on his or her Christmas 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.