Depends on what you envision their future will look like. I prepped mine with land navigation, survival skills including locating water, archery, bladed weapons including their own swords. Then there are skills. Water collection and purification, battery charging and maintenance, fabrication of medicines, bicycle maintenance, saw sharpening, really basic tech where people will be salvaging old stuff and trying to make it work in a world where all the ammo got used up long ago.
The way things are going it’ll look like Book of Eli during their adult lives. I’m trying to prep them with appropriate tools and skills.