Geocaching is one of my hobbies. I got a kick out of this geocacher using a low grade board as a cache:

http://forums.groundspeak.com/GC/ind...post&p=5215085

Geocachers also do garbage pick up while out caching called CITO (Cache in trash out). I picked up scrap metal while out caching in Nevada



If you look at the link of the cache container photo, can you spot the piece on the board that holds the nano cache log?

I was thinking that this person's use of scrap as a geocache might be a great way to educate others on the benefits of scrapping.