About
PiDay-Shirts.com is about math, fun, and pie! We want to share the fun of Pi day (March 14) every day with shirts that inspire questions about math and science and yummy deserts!
PiDay-Shirts.com is about math, fun, and pie! We want to share the fun of Pi day (March 14) every day with shirts that inspire questions about math and science and yummy deserts!