I have been asked to explain what geocaching is and how to do it. Geocaching.com has this great little short video that explains the basics of what it is and how to get started. It does a lot better job explaining it than I can.
Be careful, it can turn into an obsession.
There hasa even been a movie made about geocaching. Its called Splinterheads and here is a trailer.
You need at a minimum two things to go geocaching. First is a free membership at geocaching.com, second is a GPS receiver. Base models cost less than $100 new. Check your local Walmart, Academy or other sporting goods store, Amazon, and I’ve bought several at huge discounts on ebay.
If you live close to Tulsa and want to go find a few let me know and we can meet up. There are well over a thousand caches in the city we’ll go see if we can find some.