Find an English children's song or poem (I don't know the specific theme)

Baidu searches English children's songs. There is a seven-music children's song network, which may contain the songs you want. What I know is two.

small

black

Birds. But never get married and have children. two

small

black

bird

Sitting

exist

a

Hill. one

nomenclative

Jack

and

one

nomenclative

Jill. fly

leave

Jack

, fly

leave

Jill. come

hardworking

Jack, come here.

hardworking

Jill.