Message in a Bottle
On 25th May 2004, fifty bottles with messages inside them were released into the sea off the south east coast of England near Ramsgate Maritime Museum. Their intended destination is 800km East of mainland New Zealand: the Chatham Islands (the exact opposite side of the globe from where they were released). These bottles are different, however, because they also have GPS transmitters in them. As a kid, I launched a few messages in a bottles, but never heard anything back. With these, you can view the bottles movement in real time and read messages posted by people who have found the bottles-- much more satisfying.