num_pages: 50
description: When Harry comes to school wearing a necklace, the whole class is intrigued. Harry opens the necklace and reveals a mini-microscope&amp;150perfect for looking at the mold experiment Room 3B is working on! Everyone wants to try it, so Harry promises to show them a kingdom of mushrooms at recess. But there is one catch. They will have to go outside the playground fence, which means breaking a school rule. If they follow Harry, will they ever be able to face Miss Mackle again?
language: English
title: Horrible Harry and the Mud Gremlins
titlecomplete: Horrible Harry and the Mud Gremlins
genres: Fiction, Contemporary, Childrens, Chapter Books, School
ratings_count: 234
series: Horrible Harry
publisher: Puffin Books