Over the last week I have developed this to incorporate the BBC doomsday project. This was a nationwide project launched in 1986 to record a snapshot of everyday life across the UK for future generations. Now 25 years later you can explore the archive online, see the pictures, update the information and make your mark on this record of our history.
My interpretation of the project has been for students to fill out a booklet with their parents of their everyday lives for the students NOW and for their parents / carers / guardians / aunts / uncles / grand parents to write down what their everyday life was like 25 years ago. I've found this has worked best with photographs. Students have been really interested in seeing old photos of their parents with their fashion sense, hair cuts (perms), dogey facial hair and glasses. I've tried to request that parents find photos of what Darlington looked like 25 years (or so) ago and then the students go to the same spot and take a photo today This gets them familiar with their surroundings and looking at a scene in a different manor.
This is where the geocache comes in. Parents and students include photos of the same site and they compare the similarities and the differences and their comparison stories of life 25 years ago and now. The students and parents then go and make a geocache and hide it for the next generation to find and update.
The final element of the project is to get parents and students to present their doomsday reloaded projects to the rest of the class.