Christmas Poem from John Chalmers

Here is a Christmas math poem submitted by John Chalmers. 

Bob Grumman's Christmas Poem

This is an old math poem by Bob Grumman but I really like it. So I would like to post it again. 

Merry Christmas everyone!

Math Humor

I don't know who did this but it was given to me by John Chalmers. - If this is your image please let me know so I can credit you.