I think this is a great article to go over with your students before you begin your Internet use in the classroom. The wording is kid friendly and an easy read. This would be an awesome article to send home with students so that parents can read and discuss with their children as well.
"Hundreds of creative combinations that take the writer's block out of creative writing. Set young writers loose with prompts that focus on character (who the story is about), plot (what happens in the story), and setting (where or when the story happens)." You can also pick the story format (notebook, letter, newspaper or postcard).