Decorating a kid's room can always be a challenge. Kids grow up so fast that it is impossible to know what they will like or need next year or even next month. While the rooms in this post can't predict when your teenager will stop listening to Katy Perry and start dressing like Marilyn Manson, they can do one this expertly: transform desk to bed, beds to walls, and one boy's room into a sleepover haven. Italian design company Clei specializes in these transformable, space saving beds and desks that, as you can see in these photos, work perfectly for kids rooms.