Personalized St. Patrick's Day Rocks Toddler T-Shirt. St Patrick's Day Rocks text with three dancing rocks holding shamrocks is a humorous Irish design for St. Paddy's Day. 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.