Personalized This Little Monster is One Toddler T-Shirt. This Little Monster is One! A cute little green monster smiles because it is now one year old. Great birthday gift for your little 1 year old monster. 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.