Window seat with built-in bookshelves. Could use IKEA: Hemnes daybed kitchen pullouts each), and Billy bookcases each or with uppers each). Total cost with knobs, trim, paint, etc. would be about The skylight is a nice touch too!
Fancy Small Floorspace Kids Rooms with Veneer Floor : Elegant Modern Beige Twin Kid’s Study Room With Natural Wooden Floor Then Added With Modern White Sofa Bed With Storage Below Designed With Beige Mattress