Dolly has challenged Penny to a gunge quiz on penny's least favourite subject, Harry Potter! Dolly has 2 buckets of thick pink gunge to cover Penny in after every wrong question! It's safe to say Penny isn't the biggest Harry Potter fan and doesn't do too well, which Dolly takes great pleasure in! By the end Penny is covered in the gunge and Dolly decides that as Penny has done so bady, she should get s huge foam pie right in the face!