They are still making Bomb Bags.

Bomb bags explain a lot of where my time went as a child. I used to buy tons of these with my cousins and we would play with them outside. You would pop the inner bag of what we assumed was vinegar, and it would counteract with the baking soda in the outer bag and explode. Completely pointless now that I think about it, we never played themed games, we would just pop them with no mind at all.