Personalized Ohm Mighty Physics Youth T-Shirt. Ohm Mighty Physics with ohm mighty in coiled text inside a yellow burst. Tickle the funny bone of your favorite science geek with this design for birthdays, holidays, back to school and graduations for your favorite scientist Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.