This is the song!

Three is a magic number.
Yes it is, it's a magic number.
Somewhere in the ancient, mystic trinity
You get three as a magic number.
The past and the present and the future,
Faith and hope and charity,
The heart and the brain and the body
Give you three.
That's a magic number.

It takes three legs to make a tri-pod or to make a table stand.
It takes three wheels to make a ve-hicle called a tricycle.
Every triangle has three corners,
Every triangle has three sides,
No more, no less.
You don't have to guess.
When it's three you can see it's a magic number.

A man and a woman had a little baby.
Yes, they did.
They had three in the family.
That's a magic number.

3, 6, 9... 12, 15, 18... 21, 24, 27... 30.
3, 6, 9... 12, 15, 18... 21, 24, 27... 30.

{Multiply backwards from three times ten.}

Three time ten is... 30
Three times nine is... 27
Three times eight is... 24
Three times seven is...21
Three times six is 18, three times five is 15
Three times four is twelve
And three times three is nine and three times two is six.
And three times one is three of course.

{Now take the pattern once more.}
{Three!}
3, 6, 9.
{Twelve.}
12, 15, 18.
{Twenty-one.}
21, 24, 27... 30.

{Now multiply from 10 backwards.}

Three times ten is. 30
Three times nine is 27
Three times eight is.24
Three times seven is. 21
Three times six is 18, three times five is 15,
Three times four is twelve
And three times three is nine and three times two is six.
And three times one... {What is it?}
{Three!}
{Yeah} That's a magic number.

A man and a woman had a little baby.
Yes, they did.
They had three in the family.
That's a magic number.