looking for media to illustrate one important idea :)

What about Ants:

- painstaking
- hard-working
- diligent

You need many of them to clean the woods. Every contribution counts and
they work together.

http://www.slideshine.de/browser/uploads/94/Ameisen/Ameise%20mit%20Blatt.jpg

Also remember the ant simulation in squeak ;)