Supplies needed: Vinegar (a ton), corn starch, baking soda, ziploc bags (I suggest sandwich size) and food coloring! (I used neon, because it's Fun!)
Step 1: Pour Vinegar into bag (about halfway full)
Step 2: Scoop in cornstarch (about 2 spoonfuls)
Step 3: Mix in food coloring and seal bag
Step 4: Using a paper towel, liberally dump some baking soda into the middle. Proceed to fold the towl into a square "BOMB".
Step 5: Get outside! Put the baking soda bombs into the bags and seal it as quick as you can! (try to get it sealed completely, if there is too much air coming inside, it will not go BOOM!)
For the last one, we just dumped all the baking soda directly into the bag, but we were not quick enough sealing it! He loved every second of squirting it around everywhere!
The idea here is not for perfection, but to have a good time!
This one for me ranks about 3 out of 5 stars :)
For Taylor it was a 5 out of 5 stars!