We camped when our kids were young and still at home. My kids loved "hobos" which was my name for this:
In heavy duty aluminum foil, make a large ground chuck patty. ON top of this, put a serving of sliced potatoes and chopped onion. Salt and pepper well. Fold and seal the foil. Place the foil on the edge of hot coals and turn about every 10-15 minutes. They will be done in about an hour or so.
We also took canned biscuits, rolled them out like snakes on waxed paper, then wound them around campfire forks; pinching the ends to make them stick together. Hold them above the fire where the heat from the fire can bake the biscuit. When they're lightly browned, slide off onto a paper plate, squeeze some soft butter and cinnamon sugar..yummy!