Children enjoy reading fiction just as much as adults do. They enjoy almost everything adults enjoy, plus some things adults have left behind, such as the classroom drama. Children's imaginations are wide open for all kinds of stories, from serious to silly.
The library keeps a list of new kids' fiction on the New, Best & Fun page. (You'll find a tab for New, Best & Fun on the catalog). The current list includes "The Case Of The Missing Donut" by Alison McGhee, and "What We Found In The Sofa And How It Saved The World" by Henry Clark. Those are two of the silly titles, but there are plenty of others for the more serious reader.
Take a look at the list if you are looking for fiction for younger readers. You'll see new authors and ideas every month to satisfy all kinds of interests.