An Ikea Hack custom train and activity table with TONS of storage. This is such an an EASY DIY project and a great way to get all of those toys up off the floor and organized once and for all! Maybe a Lego table and storage?
Like the way the bookshelves are installed, small footprint, bins below. SUCH a cute children's play area. Narrow shelves just right for displaying children's books . I like the low built in window seat. Could do along a wall as well.
This is a neat reading nook. I like the idea of curtains in place of doors, especially since this is a kids' room. Keep an eye out on them, but they feel like they still have privacy. This is a great idea for a playroom, too.