I work in a place where we have to travel occasionally (depending on the project - I rarely travel but some colleagues are always abroad) and new hires usually think that's exciting until they do it once or twice.
I think the ideia that entrepreneurs are in their early 20s comes from the media: a dude still in college "makes it big" is big news, but when someone in his 40s "makes it big" is not such good news, or doesnt sale as many magazines/pageviews.
i had one that taught 4 (??) basic games on the c64 and spectrum. loved it. thinking about it, that's how i learnt to program. unfortunately i think i might have lent it to someone that didn't use it and didn't return it... :(