Here's a Creative Learning idea from Siva, on recycling old glass-top tables:
I love using whiteboard markers on glass-top tables during meetings. It helps when illustrating points during a discussion, and the museum meeting room has one which I have often left covered in scrawls.
When I moved back into my office, I shanghaied an old glass-topped table so that discussions could continue in my corner even when the other room is occupied. Its another feature of my now Toddycats-friendly office!
The glass top came in useful during a discussion about crab diets last week. The photo was left over in the Canon 300D I borrowed to try out.