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How about bring the younger generation off of the couch / from in front of the computer to interacting with the Physical World? Try working through some projects in Make Magazine (www.makezine.com). They have microcontrollers in there where you can work with simple algorithms and math, but they also have cool Biology projects, or hacking projects.
Tinkering, taking apart radios, looking at open-sourced code. All of these mechanical, digital, and biological dissections are what have inspired the young in past generations. It's only more exciting now, because all of these "Sciences" are available to us in cheap home-brew projects.