On the playground, there are two fathers and three kids. There is a slide on the playground. On the slide a boy is sliding down upside down, and his father is catching the boy. The other father is holding a girl in her left hand. The other girl is on his back and the father is holding her right hand with his right hand.

(Is the passage grammatical? Would you check the sentences? Thank you.)

On the playground, there are two fathers and three kids. There is a slide at the playground on which a boy is sliding upside down, and his father is catching him. The other father is holding a girl by her left hand. The other girl is on his back, and the father is holding her right hand with his right hand.

Compare carefully!!

The passage you provided contains several sentences that could be restructured to improve clarity and readability. Here's a revised version:

"On the playground, there are two fathers and three kids. There is a slide where a boy is sliding down upside down, and his father is catching him. The other father is holding a girl in his left hand, while another girl is on his back, and he is holding her right hand with his right hand."

By making these slight changes, the sentences are now grammatically correct and the meaning is clearer.