900 Years Old Kids T-Shirts

For a mathematic-minded person who is thirty or is turning thirty years old, here's a playful gift that celebrates his/her age through a mathematical way, the square root of 900 being 30. Fun shirt for anyone who likes math, numbers, science, and is a bit of a nerd or geek.

30 years old 30th birthday Gift Square Root of 900. 30 yrs old 30th birth-day mathematics humor, funny math age number problem.