This is a great graduation song for preschool and kindergarten.

B-I-G I'm Big
by Wayne Potash

I once was one but now I'm two
I'm almost as big as you

(chorus)
B-I-G I'm big, B-I-G I'm big
B-I-G I'm big, I'm big, big, big

I once was two but now I'm three
I'm as big as I can be (repeat chorus)

I once was three but now I'm four
Look at me I've grown some more (repeat chorus)

I once was four but now I'm five
I can almost reach the sky (repeat chorus)

I once was five but now I'm six
I'm bigger than the other kids (repeat chorus)