This isn’t necessarily a snack suggestion, but rather a salt suggestion.
In the US Morton makes a Popcorn Salt that is very finely ground. It really sticks to whatever you put it on. I use it on popcorn that I pop in a Nordic Ware microwave popcorn popper using coconut oil. We now have one of those popcorn poppers at work, and make popcorn nearly every afternoon. Everyone says it’s the best popcorn they ever ate, especially using Orville Redenbacher’s Tender White bulk popcorn.
But anyway, I know you’re concerned about popcorn being a choking hazard, so I’m just saying that if you need to add salt that will stick and provide a lot of flavor, Morton Popcorn Salt will do the trick.