Mommo Design has a bunch of inspiration for girly reading nooks. These quiet corners contain fluffy pillows, rugs, cushions, usually a canopy, and of course lots of books. I think the idea is very cute and I'd love to do this for my daughter's room.
Adults need to have fun too! Any slide for adults in a house is a great idea, but this one contains a water slide. Excellent choice of transportation and you can even get a shower on the way out of bed going down to get breakfast!
STAIR IDEAS-- I love the idea of fairy lights along the banister. It gives a pretty effect and would be pretty for during Christmas time or a holiday season(this could also be used for all year round).