If you have a guy in your life age 6 to 106 ... or a girl who is fascinated by mechanical things, you must get Crazy Machines software. Evan got this for his birthday and I am telling you, it is a riot. Basically, you can build all these Rube Goldberg mousetrap-like machines and make them do all sorts of crazy things. Believe me, any guy and lots of girls will be fascinated by this.