Day beds are perfect for older children and teenagers as they fit with the idea of making their bedroom more into a bedsit, or a place where they can hang out with friends in more grown-up surroundings. This one also comes with a spare bed underneath which is handy for sleepovers.
This one has obviously been styled in white giving it a more girly look but you can get lovely grey jersey bedlinen from Muji which would look great in a boys room (or even girls come to that) and with a few bright orange cushions or lime green accessories.