I assume no shop or votech at his school?
Shop class - ha - that's living in the past, most school shops seem to have been killed off 30 years ago. Not that I think that was a smart move, but the people who write school budgets evidently didn't like them even more than they didn't like music programs, and they are none too fond of those, either.
Yes, the switch is turned on! I have an old Radio Shack dual-heat iron from a few years ago when I thought I would try soldering. Used it once! it is switchable 20/40W. model 64-2184. Looks like it will work for him.
Call me a snob-a-saurus, if you like; there's a HUGE difference between using a temperature controlled iron and any "fixed-wattage" iron. Mind you, I think I started with one of those absurd "guns" at 100 or 100/150W. And I've got some hunk of junkpencil iron from rat-shack I can't bear to throw out, but which I have not used for decades because it's junque, by comparison. But if my TC iron broke, I'd repair it or buy another long before I'd reach for one of those. And unless you think the kid is going to flake out, so why bother, dealing with a fixed-watt iron (even with two wattages) is liable to be a contributing cause to flaking out, since it makes everything harder. Especially dealing with today's parts where so many things are only available in surface mount (read, tiny, tinier, and even more absurdly tiny than that...) At the very least, think in terms of if he shows any sign of continued interest, think really hard about getting him a decent iron - it might last the rest of his life (while actually getting used.) The RatShack one will probably last as long, but mostly due to "tried soldering once, put it away" repeating...
To expand on LowDownHawkEye's post, it's
also frustrating when the iron gets too hot, burns off the tinning, and won't wet without a complete re-cleaning - or even burns off the plating and then really goes to heck in a hurry....this is why control is good.
And - please get electronics solder rather than going at it with plumbing solder. You want stuff that's sort of middling guitar string sized, not bass B & E string sized. With flux that won't eat the circuit later on...