I've used one of the Windmill Classic lighters REI sells (they also sell a Windmill Delta lighter), and it works pretty well. They're advertised as "Stormproof," and I've never had any problems with the flame being snuffed out by the wind. However, they are butane-fueled, and I have had some issues getting them to work when temperatures get into the low 20s. Usually, heating them up in my hand or a pocket inside a jacket does the trick.

Of course, I also carry some strike-anywhere matches and one of the magnesium sparking kits, just in case. Don't send your son out with only one way to get a fire going.