Personalized Monster 5th Birthday Toddler T-Shirt. I'm 5! A giant lizard monster towers over a burning city, shouting that it is 5. Cool birthday gift for any five 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.