Personalized Monster 6th Birthday Toddler T-Shirt. Cute 6th birthday Toddler T-Shirt - Natural with a funny cartoon purple monster, stars and polka dotted number 6 says THIS LIL' MONSTER IS SIX! 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.