Hi, this
http://paintingcoin.blogspot.de/ is an idea I just had today. It is an experimental cryptocurrency that works like collecting with no measure against double-spending. The mining is done by using your brain. This means you have to click until you seen a picture that you recognize as probably human-made. While doing this you learn how hard it is and how much time someone must have invested for a picture. It's up to the user to determine the value of an image that they receive. You either say "I have this already" or "it looks like nothing"; or you say "great, this seems new and worth something".
The first numbers of the seed are real randomness (lottery or sports results, I took euromillions for example). The last number is your own try-number. If the image seems to represent some thinking, it is probably not older than the real randomness. So you can give it a value base on its age (newer = less copies = more value) and its look (random = artificial intelligence, nice = human intelligence).
Here are some coin examples. Someone dancing tango, an agent, something about music, an old military plane and a witch.
2 30 38 43 46 2 7 47085949
2 30 38 43 46 2 7 47086060
2 30 38 43 46 2 7 47086796
2 30 38 43 46 2 7 47086992
2 30 38 43 46 2 7 47087041
