Personalized 1st Birthday Dinosaurs Toddler T-Shirt. Cute dinosaurs gather to celebrate baby's 1st birthday. Happy first b-day little one! 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.