Dive into the world of story book characters and popular movies with our cool collection of boys World Book Day costumes. We have outfits to impress boys of all ages and interests! World Book Day takes place on 7th March 2019, giving every child the opportunity to receive a book of their own. It's tradition to dress up in character costumes in schools across the country and your little one will no doubt be looking forward to the event. Our boys World Book Day costume range includes everything from Harry Potter, to The Gruffalo, Peter Rabbit and Willy Wonka. There's something for everyone; both fictional and factual! Shop our full collection of boys World Book Day outfits above.