Definitely not. It's unethical. A little girl should be protected, and such a scenario in stories can be seen as violating her rights to privacy and safety. We should focus on positive, age - appropriate and respectful content when it comes to children.
A girl should not be naked in a public swimming pool as it is inappropriate and against most pool rules and social norms. In a private pool setting among family members, even then, being naked is not acceptable behavior as it goes against basic modesty and propriety.
A story could be about how she learned to swim in the pool. Maybe she was a bit afraid at first, but with the encouragement of her family, she overcame her fear and started to enjoy floating on the water. Another story could be about a fun pool party where she played pool games with her cousins and friends, like marco polo.
Rebirth: Prince Fu Begging to Let Go. I suggest you read this modern romance novel. It tells the story between the female lead Ye Mo and Fu Tanshen, including the scene where Fu Tanshen carried Ye Mo out of the swimming pool. I hope you like this fairy's recommendation. Muah ~😗
One horror story is about a swimmer who saw a large snake in the pool. It was slithering along the edge and he panicked. Another is a girl who felt something grab her ankle while she was underwater but when she surfaced, there was nothing visible. And there was also a case where a man found a large, dead rat floating in the pool, which was really disgusting.
One inspiring story could be a mom who learned to swim later in life to overcome her fear of water for the sake of her kids. She took swimming lessons and gradually became confident in the pool. This not only allowed her to have fun with her children during pool outings but also set a great example of perseverance for them.
One story could be going on a camping trip with your little girl cousin. You can teach her how to set up a tent, look for interesting bugs in the forest, and tell stories around the campfire at night.
The three friends might be two boys and a girl. The girl has feelings for one of the boys, but she is too shy to admit it. At the swimming pool, she sees the boy in a different light, like when he is teaching her how to swim better. This makes her feelings grow stronger and she decides to finally confess at the poolside.
Taking underwater photography can be an interesting activity. She can use a waterproof camera to capture the beauty of the pool underwater, like the patterns on the pool floor, the way the light refracts in the water, and the fish if there are any in a pool with them.