Personalized I'm Three Cute Birthday Bear Toddler T-Shirt. I'm Three! A cute teddy bear has its own birthday cake to celebrate its 3rd birthday. Cute gift for the three 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.