OK, sounds like the worst that can happen is he messes around and blows it.
I am going to talk to his parents and if they give the OK, explain Bitcoin as best I can and offer him the options, including cash. In fact, I saw him last night at a family get-together and gave him a bit of a tutorial on what I had learned so far and set some "homework" f watching copies of short videos on Bitcoin.
Either way, I will soon be ready to dive in with a minimal purchase of my own just to get the hang of it. Any recommendations for an exchange with a low minimum charge (under 50 UKP) and low commsiion?