Personalized This Kid is 5 Birthday Toddler T-Shirt. This kid is Five! Celebrate your child's fifth b-day with this cute thumbs up 5th design. Happy Birthday 5-year-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.