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!