Check goodwill for clear containers--I found this terrarium teapot and 12 "mini worlds" on the web ecoist. I know terrariums are in but this is something incredibly special - and even better it's ALIVE !
Marking the degrees that a door can open is a great visual (image only)
I would love a reading nook in the ground floor between the kitchen and the living area...or on the second floor near the entrance to the terrace perhaps??