I just found out about letterboxing!  I will fill you in for those of you who don't know. (As I'm sure most of you don't!) 

It's kind of like a 'treasure hunt' but clues are found on the internet and they can be anywhere in the world. 

"Letterboxing is said to have started in England in 1854 when a Dartmoor National Park guide, James Perrott of Chagford, left a bottle by Cranmere Pool with his calling card in it an an invitation to those who found the bottle to add theirs. Eventually, visitors began leaving a self-addressed post card or note in the jar, hoping for them to be returned by mail by the next visitor (thus the origin of the term “letterboxing;” “letterbox” is a British term for a mailbox). This practice ended in time, however, and the current custom of using rubber stamps and visitor’s log books came into use." (Excerpt from www.letterboxing.org)

There's a number of them right in Alberta so I hope to get out to some of them with the kids this summer!  Maybe we'll even plant one of our own!  Check out these sites to find out more:

www.letterboxing.org

www.atlasquest.com