Zombies are fun, but I'm feeling the dystopian government thing today. Don't worry about continuity, if you're posting you can include or ignore it, whatever.
When I was in gradeschool I used to read anthologies of kids' stories revolving around monsters, aliens, ghosts, stuff like that. The editor of these books did a story with a chapter in each book and incorporated the book's theme in each chapter. It was a convoluted story, but it looked like fun to write. Play along if you like! I'm thinking aliens soon.