Far-seeker:
[quote author=Jack Christensen link=topic=127902.msg961923#msg961923 date=1350584415]
Another idea would be an accelerometer that attaches to the waist or maybe ankle. That'd be a more advanced project because it should probably be wireless.
It wouldn't necessarily have to be wireless, if skybill20 doesn't mind strapping a box big enough to fit an Uno and LCD screen on to one of his/her wrists or forearms, or mounted on a belt.
[/quote]
Good point, and a purpose-made board could be even smaller. Maybe a small four-digit seven-segment display, and powered by a couple AAA cells. I've been thinking about a data logger that would interface with a Polar heart rate sensor that I could take jogging. That probably wouldn't have a numeric display, but should be about the same size, business-card size at most.