Personalized Firecracker 3rd Birthday Toddler T-Shirt. Cute Toddler T-Shirt - White 4th of July 3rd birthday design with a big blue number three firecracker filled with red and white stars and star burst. Perfect for 4th of July third birthdays! 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.