All characters etc are the creations of JK. Rowling...
Chapter 6
"Harry, Ron says you found something," Hermione said, looking at him over the breakfast table.
Harry ignored her. Couldn't anyone eat in peace.
"Some kind of hourglass magnet," Hermione continued.
"Yeah, show her the magnet," Ron said, looking a little nervous.
Harry ignored them both. Ron shot Hermione a look who shot him a little glare. Did they think he was stupid. They wanted the magnet. Harry pushed away from the table and stalked off. He had stuff to do anyway. He needed to get ready.
He hurried down the halls to the dungeons. Students began to file past for their first classes. Harry felt the pocket with the hourglass magnet and the potion he'd taken from Snape's room for the hundredth time. Both were still there. Harry looked around the hall for Hermione or Ron. They were on to him he knew it, but it wouldn't be long now.
He slid into Snape's room. It was empty. He crept up to the books on the walls. Lets see Snape assign homework without his hundreds of books, Harry thought.
He uncorked the vial.
"Harry stop."
Harry looked behind him at Ron and Hermione running toward him with a determined look.
"Harry, have you lost your mind," Hermione said.
"What are you doing," Ron asked.
They were too late. He poured the potion on to the books and splattered it around the room for good measure. Ron and Hermione reached him as it hissed into the books.
"What have you done?" Hermione asked.
"You'll see," Harry said, grinning with satisfaction. His grin disappeared as flowers sprang up from the books and then spread. Flowers grew along the bookcase and wall until they engulfed the entire room.
Hermione and Ron laughed.
Harry threw the vial down in disgust, his prank ruined. He stormed out as Hermione picked up the vial. She whispered something to Ron who immediately lost his grin.