Materials:
A bottle with a popping lid
A cup of baking soda
A cup of vinegar
Tennis ball can (empty)
Safety glasses (wear eye protection)
Adult help
An outdoor space
Directions: Find the bottle with a popping lid. Then, go outside and fill up the bottle with the baking soda. Then, take the tennis can and prop it up, so that the mouth is facing up. Then, quickly pour the vinegar into the bottle and put the cap on. Put the bottle, lid faced down, on the tennis can. Back away quick! What happened? Send us your results by going to www.spectacularsci.com/contact!