Writing tip: for a child POV, anthropomorphize the world.

The wind was loud -> The wind insisted on being heard.

The dolphin jumped high -> The dolphin delighted us with his best jump.

We were walking on mud -> The mud liked the shape of our boots, and kept it.

Further, how the child imagines the environment relating to them tells us about their personality.

If a wave splashes the kid, the sea can be grumpy, or mischievous, or trying to say something.