Personalized Ohm Mighty Physics Toddler Full Zip Hooded Jacket. 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 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.