Personalized 3rd Birthday Boho Rainbow 3 Year Old Toddler T-Shirt. Cute boho rainbow for children celebrating their 3rd birthday party. 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.