Personalized Luckiest 3rd Grade Teacher Toddler T-Shirt. Funny St. Patrick's Day Toddler T-Shirt - Purple for grade school teachers with lucky horseshoe, pot of gold, Irish shamrocks and chalkboard text says LUCKIEST 3RD GRADE TEACHER IN THE WORLD. 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.