What do I want to do?

Make side walks more interesting!

How?

1. what could be the multiple uses of the sidewalk
2. can it be inexpensive
3. can the sidewalk be flexible
4. can it be an intelligent side walk
5. can it be a little more than a sidewalk?

Interesting examples, could be a sidewalk that generates energy or that becomes a dance floor.
But how?

http://en.wikipedia.org/wiki/Piezoelectricity