Personalized Ohm Mighty Physics Teacher Toddler T-Shirt. Ohm Mighty text in a star burst and the text Physics Teacher is a humorous play on words to tickle the funny bone of your favorite teacher at back to school, graduation or holidays. 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.