I hate recommitting, as I am in target guns.
But I would recommend as well a mid priced semi auto , ruger, smith .
A better idea is if you know some one with lots of guns, go with them to the range, take some ammo , and see what they like.
I started out on a SAA 22, and that was great, but slow reloads, than got a semi auto 22 and hardly ever shoot a single action.
If the kids are older, teenagers, they could handle a 9mm or a 38 special double action revolver, But start with a 22 of some kind, preferable US made out of steel
They will all shoot great and always work, if the mags are good, same can not always be said for cheap off shore stuff.