Personalized 7th Birthday Baseball 7 Year Old boy Toddler T-Shirt. 7th Birthday Toddler T-Shirt - White and Black has baseball with being seven is a ball slogan quote for kids turning 7 years 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.