"I Spy Pi" Math Headband - Adult boy wonder dubbing your favorite songs into

dubbing your favorite songs into the perfect pop mix

and apples are there for the gobbling

stretchy cotton/spandex fabric comfortable in any season

The colorful video game controllers on this headband will push all the right buttons with your favorite little gamer girl

and wide-leg fit for starry lounging around-the-house wear

"I Spy Pi" Math Headband - Adult boy wonder dubbing your favorite songs intoWith this design, the delight is in the details AND the big picture. Up close, tiny mathematical symbols, diagrams, and numbers swirl around in pink and purple. But take a few steps back and a bigger picture emerges its the symbol for Pi, formed out of the negative space.