Personalized Ohm Mighty Physics Teacher Toddler Long Sleeve 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 classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.