How to imitate and write children's songs?

A big one, a small one, an elephant, a cat, more than one, less than one, a group of tigers and a wolf. Count, have a look and remember the size.

Two, one big and one small cotton, with a hair on one side and a piece of wheat and rice on the other. Count it and see how big it is. Remember it.

Three, a big one, a small one, a yellow cow and a cat. More on one side, less on the other, a flock of ducks and a bird. Count, have a look and remember the size!

Four, a big one, a small one, an elephant and a sheep. More on one side and less on the other, a group of small fish, a boat. Count, have a look and remember the size.

Five, a big one, a small one, an elephant and a cat. More on one side and less on the other, a group of small fish, a bird. Count, have a look and remember the size.