How exciting is this! J K Rowling is in the middle of writing a brand new children's adventure story. She's publishing new chapters every day and she'd like YOU to send her illustrations to go with it. Also, it's a competition and the best pictures will be published! But even if you don't win, Rowling is tweeting and commenting on the best entries she's receiving. (If you want to check that out, you'll have to ask an adult to show you.)
You can read Rowling's new story, and see the competition details here.