My opinion doesn't count for much but you may still want to consider something more modern like a Nikon N80 w 50/1.8 AF. It's plasticy but tightly built, and kids being what they are, they may want AF and lightweightness. It does manual focus just fine and the handling transfers to more modern digital cameras.
And from an engineering and usability point-of-view, I'll argue that it is Nikon's crowning achievement, putting that much technology into an easy-to-use and inexpensive form. That's harder to do than making a F6 imho.
Oh and the metering is dead-on perfect, it has a flash, and it could well be more rugged than a 1970s hulk, even if it doesn't have all the mojo... it will make really good photos.
I bought a near mint set like this last year for $120. Expect to pay a bit more if you're impatient, but $150-$160 should cover it.