Personalized Ohm Mighty Physics Teacher Newborn Layette. 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. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months