A bit dramatic for a tiny house but above the bed would be awesome While it looks like a greenhouse, this coastal home in California, built by Mickey Muennig, has a removable window which helps keep the place cool.
Charming Cabin Built for $500 with Repurposed Windows
Cabin built for $500 with re-purposed windows in the mountains of West Virginia (with probably very little energy efficiency, but hey, it's pretty).
You can build a tree house in your back yard as an office or extra room, or guest house or if you really love your kids a play house for them. But I am not so sure you want to waste this kind of awesomeness on kids.