[ViolaMum]

Pancakes, waffles, & muffins
meatballs
baked taquitos
chicken cutlets
burgers
stir-fry
pasta w/pesto
pizza (from real to English muffin)
nachos
French toast casserole
bread
zucchini noodles
eggs
salsa - not really cooking, but helpful
simple pasta sauces - pesto, lemon & garlic, alfredo, carbonara (to my chagrin, I can't get them to pay attention long enough to make a pot of marinara. I'm not going to be able to call these kids Italian!)
roasted veggies, esp.green bean "fries" and radishes/parsnips

My kids tend to be picky - they won't usually eat soups or casseroles, so they haven't tried making those.

I taught cooking classes at our co-op for kids 2nd grade up. With direction, they made all sorts of simple recipes. I started with knife skills and went from there. I'll bet your library has loads of kids' cookbooks that would give you some more ideas. I found the international cookbooks helpful. There are vegan and vegetarian cookbooks aimed at kids, too.