Not all Halloween treats come in wrappers. Some come in a pumpkin

Carving pumpkins is messy work, but there is a built-in snack reward at the end. Not only are they delicious, but making your own crunchy pumpkin seeds means you get to make sure the amount of oil and salt remains within reason, and you also get to show your kids that not all snacks come in crinkly bags; sometimes they come in a pumpkin. Then remove the pumpkin guts from the seeds.