This looks like another nice physics simulator.

MIT created one years ago that seems to be the parent of all these newer versions. Take a look at:

http://www.youtube.com/watch?v=d7eGypGOlOc
http://icampus.mit.edu/MagicPaper/

And this nice variation:

http://www.kloonigames.com/crayon/

That hand drawn mind map is beautiful. I found this article on creating mind map recipes:

http://www.freesoftwaremagazine.com/articles/making_mind_maps_with_freemind

Not as pretty as the hand drawn map though.