Mine I spoke to my DS about working abroad on a placement, he was aware of the opportunity but said it involved 'too much hard work', hmm. Pleased to hear that your DS is clearly more motivated.
Peer pressure can have a big effect. My ex-boyfriend did a 6 month internship in the US the year before I did. He came back absolutely determined that I should take the chance to do it because he'd got so much out of living abroad (and we were from the same crappy northern town that offers very few opportunities like that).
It was him being so enthusiastic that really convinced me to do it, and I've never regretted it.