You're going to want to save this fizzy pumpkin STEM experiment created by lowliftfun 🎃 It's fun to put an Autumn or Halloween spin on the classic baking soda and vinegar science experiment. Here's how to get started: carve out the mini pumpkin put a scoop of baking soda inside add vinegar (you can use a pipette or medicine dropper!) If you want to dig a little deeper and teach the science behind this reaction read on! The two components react because one is a base the other is an acid. Acids and bases each have different parts of H2O, or water. Bases contain an OH, or an oxygen and hydrogen atom, which together is known as hydronium. Acids contain the other H, one hydrogen. These really like to join and form water, so they break away from the acid and base to react. In this case, baking soda is sodium bicarbonate (a base) and vinegar is diluted acetic acid. When they react to release the OH and H to become water, they also release carbon dioxide. This makes the reaction bubble ...