oh, number pi

(Sung to the tune of "Oh, Christmas Tree")

Oh, number Pi
Oh, number Pi
Your digits are unending
Oh, number Pi
Oh, number Pi
No pattern are you sending.
You're three point one four one five nine, 
And even more, if we had time, 
Oh, number Pi
Oh, number Pi
For circle lengths unbending.

Oh, number Pi
Oh, number Pi
You are a number very sweet.
Oh, number Pi
Oh, number Pi
Your uses are so very neat.
There's 2 Pi r and Pi r squared,
A half a circle and you're there.
Oh, number Pi
Oh, number Pi
We know that Pi's a tasty treat.

(courtesy of the Intervention Math team)