"I Spy Pi" Math Headband - Adult boy wonder Hot pink rockets blast off

Hot pink rockets blast off into space amidst curly contrails and other dainty details on this perfect headband for the sartorialist engineer aged 2+

dubbing your favorite songs into the perfect pop mix

with your choice of sleeveless or long sleeves style

and apples are there for the gobbling

"I Spy Pi" Math Headband - Adult boy wonder Hot pink rockets blast offWith 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.