Home ec is basically a type of practical arts. Cooking, cleaning, laundry, those sorts of things. It's a good excuse to get your kids to learn how to be fully independent if they need to be.
If you want actual practical projects, try www.instructables.com
. They have all sorts of things, from very easy projects (like a powered boat made from a candle and aluminium foil
) that kinder kids could do, to ludicrously hard projects (like making solar panels
). It's free, and every project has instructions and photos of what to do for each step. No parent involvement necessary, except to keep an eye on things so they don't get too liberal with scissors and so on.
My kids make rubber band powered cars, miniature candle hot air balloons, amphibious vehicles, and so on, based on some of the easier projects. It's great for art and physics. Anyway, if you want these sorts of things but aren't sure how to teach them, get your kids browsing this site to find things that interest them.
And if you really wanted, maybe you could find a friend's parent who knows more about woodwork or sewing to spend an afternoon with them to help them out with the basics. After that they should be fine on their own to create projects.