Step 1: Vinegar Bag
fill a small zip lock bag half full of vinegar
Step 2: Baking Soda Bag
take 1/4 of a cup of baking soda or more for biger explosion then dump it into a larger bag then the first one
Step 3: The Glueing
take the smaller bag and place it in the larger bag then take your hotglue gun and glue the top part of the big bad make sure there are no holes in the bag and the bag is completly seeled
Fission Chips made it!