When I was that age I think I just wrote stories of my cats and pets that were taken away from me running away and finding their ways back home to me.
We moved a lot as a kid cause we had to keep getting cheaper places to live, and a lot of the time the places we moved would not allow pets, so we would have to give them away to people we usually didn't know, while for the few people we gave them to that we did kind of know the people (friend of a friend from mom's church or something like that) didn't really care for them and if we asked about them it would usually be a response like "she got hit by a car" or "he got out and coyotes killed him."
So I would spend a lot of time wishing/writing that they would have found a way to find me in the new place I lived so they could live happy with me and not have gotten killed by a coyote or whatever like irl.