Personalized We're One Twin Boys Toddler T-Shirt. Twin boys with rosy cheeks, blue tank tops and shorts say WE'RE ONE 1st birthday Toddler T-Shirt - Kelly Green. 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.