I used synfig once to do small animation on the wikipedia page about time travel. Check it out there : http://en.wikipedia.org/wiki/Time_travel#Ideas_from_fiction
I'd like to do something similar for bitcoin.
First, we explain the current banking model with a classic Alice and Bob situation :
Then we show how such a model tends to make people dependant on a highly centralized organisation :
We explain that such centralisation induces complexity and therefore costs.
Thus we introduce the P2P model, getting rid of the bank :
We explain that everynode receive every single transactions, and in order to determin who will play the role of the bank, we have them perform a CPU spending task :
Finally we explain what happens when a node has finally performed this task :
This is just a first draft, but it's the global way I see it.