Not only do bunk beds optimize unused vertical space, they provide a great fraternal experience for siblings, whether boys or girls. Two always seems better than one and here it holds true. These are great for kids who share a room, as there will always be a spot for an extra guest. If your family is growing but your home isn't growing along with it, bunk beds are the perfect way to add extra sleeping space to any room. Green is a relaxing choice that reflects natural tones.