Nursery rhymes

All this while I've known that there are at least three nursery rhymes sharing the same tune.
The most popular of it is perhaps Twinkle, Twinkle Little Star.
The other two:
Baa Baa Black Sheep, and
The Alphabet Song (you know: 'aye, bee, see, dee, ee, eff, gee...')

When Marsya was in N2 kindergarten (nursery), one of the songs that she learnt was Little Monkeys.
It didn't occur to me at first, just that only recently I noticed that the tune is the same as the Alphabet Song. Marsya and Adam were jumping on my bed and I started to hum the Little Monkey song. That's when I realized that now there are four nursery rhymes with the same tune. Amazing.

Here's the wording for Little Monkeys (you can start with any number and repeat the song reducing one monkey each time until there is none...).

Little Monkeys
Three little monkeys jumping on the bed
One fell down and broke his head
Momma called the doctor, the doctor said
No more monkeys jumping on the bed

Two little monkeys jumping on the bed
One fell down and broke his head
Momma called the doctor, the doctor said
No more monkeys jumping on the bed

One little monkey jumping on the bed
One fell down and broke his head
Momma called the doctor, the doctor said
No more monkey jumping on the bed