I invested in a stovetop hand-crank popcorn popper. I use organic popcorn that I buy in bulk, virgin organic coconut oil, sugar and salt to make healthy kettle corn. The kids love it as a treat and it keeps for a day or two in a sealed container. The cost is maybe a dollar or two per large batch.
Bonus: We can use the popcorn popper on the top of the woodstove if needed.