With a life-size version of the game Mouse Trap, sculptures that shoot fire, and even people riding around in motorized cupcake cars, the Maker Faire is where you can find everything you could ever imagine making yourself... even if you don't know why you'd ever want to. For the fourth year in a row, the festival in San Mateo, Calif. has filled a local fairgrounds with crazy gadgets, some more practical than others. Here is a list of my top five favorite things I’ve seen so far.