Keep Calm and Just Breathe

Required materials:

plastic soft drink bottle, straw, rubber band, scissors, balloons, clay


Breathing ensures oxygen is transported to cells so they can function while removing carbon dioxide, a byproduct of this process. This lesson involves constructing a model lung to show how the complex process of breathing keeps us all alive.


Materials don't necessarily have to be purchased new for this activity. Household or classroom items that you already have can be used and reused for this activity, saving you even more money!

NGSS alignment:

2. Developing and using models 6. Constructing explanations (for science) and designing solutions (for engineering) 8. Obtaining, evaluating, and communicating information