Demonstrate the states of matter by building a fizz inflator. This a a fun experiment for a unit on states of matter. You combine vinegar (liquid) and baking soda (solid) to create a gas (carbon dioxide), which blows up the balloon. Before the experiment, have students make a prediction and write a hypothesis. After the experiment, have kids draw and label the parts of the fizz inflator (solid, liquid, gas) in their science notebook. Visit Science Bob to see basic fizz inflator instructions.