At an afterschool daycare I work at, two girls around eight years old were working on stories, and I asked each of them what they were about. One was writing a wicked cool story about a girl who had found out she was adopted and wasn't from earth. Her parents had hidden the spaceship they'd found her on. The girl writing it may not have known about the themes in her story, but it was a great exploration for her age on identity and belonging.
The other girl was writing a story based on her life, a comedy of sorts about the various "misadventures" she's had with her family, like her ice cream melting and dropping.
I encouraged both of them to keep at it.