Oooo, they look fun and interesting!! Especially the one about children's spaces. I am always looking for neat and fun ideas since my daycare is not my home. I am pretty wide open as to what I can do.
I recently bought one of those clear half dome shaped things that you see on the play places at McDonald's and am having my DH put it in the wall of one of my playrooms so the kids can look outside. Like this;
http://www.cleardomes.com/cddn.jpg