One of my favorites from when I was a staff member at Island Park Scout Camp in Idaho.  Green Grow the Rushes O is a song with twelve verses that will have your scouts clapping and stomping by the end of it.

Here are the lyrics

I'll sing you one, O
Green grow the rushes, O
What is your one, O?
One is one and all alone
And evermore shall be so.

I'll sing you (the next number), O...

I'll sing you twelve, O
Green grow the rushes, O
What are your twelve, O?
Twelve for the twelve Apostles
Eleven for the eleven who went to heaven,
Ten for the ten commandments,
Nine for the nine bright shiners,
Eight for the April Rainers,
Seven for the seven stars in the sky,
Six for the six proud walkers,
Five for the symbols at your door,
Four for the Gospel makers,
THREE!, THREE!, THE RIVALS!,
Two, two, the lily-white boys,
Clothed all in green, O
One is one and all alone
And evermore shall be so.