My grandfather, whose background was in economics, became very interested in science later in life and built a fully functional Tesla Coil [1] in his basement in his 60's (this was before wide-spread availability of information on the internet; he did research in libraries and universities and built it out of hardware store parts). I was about 7 at the time.
We would do experiments with it such as lighting up free-standing fluorescent bulbs up to 15 feet away, or affixing an ion motor attachment which would reach incredible speeds.
I am now 25, and like my grandfather, I never want to stop learning.