I think you should make a unique story to make people think, like here's a few idea starters:
What if there is secretly a world where things live inside your pillow?
What happened to *insert name of kid here* when the school bully tried to flush him/her down a toilet? (Sorry, totally random, but then make something really cool happen, like something fictional, not just they got wet, angry, and humiliated.)
What if you went searching in the attic and found a chest that said, 'Do not open'?
And what about this one: (me thinking about the PeterAnswers situation)
What if you found a person on the internet by yourself who appeared to be psychic, and threatened to spill your deepest darkest secrets out to everyone if you didn't do what they told you? And what if your deepest darkest secrets were really embarrassing and you didn't know if you could tell your mom or anyone about your problem because she might ask what you're worried about if your secrets aren't bad but really they are so you can't tell her a thing, you worry?
Those are the best I got right now. If I think of anything else, then I'll edit.