Mario Game

Here's a trailer for a Mario fan game.

Super Mario Bros. Crossover is a fan game that recreates the original Super Mario Bros. and allows you to play it as characters from other games.

  Here's the game itself.

Maker Faire

Here's an essay by a kid who says going to Maker Faire changed his life:
http://whatsnext.blogs.cnn.com/2012/02/08/how-maker-faire-changed-my-life/