Personalized I'm One Cute Birthday Bear Toddler T-Shirt. I'm One! A cute teddy bear has its own birthday cake to celebrate its 1st birthday. Cute gift for the one year old! 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.