I love this way of decorating a wall with retro wallpaper. All you have to do is see if you can find a shop that sells the paper per meter. I know you can get this at RetroVilla or Swiet (Belgium). Than you finish it with a desk shelve at the bottom and a decoration shelve at the top.
I'm sure the kids also love the little matrass on the floor filled with cute playful cushions. Ideal spot to enjoy a little book or play with your dolls.
Image: House of Pictures