Ms. Frizzle and her class learn about vibrations and sound by playing with instruments and hitting objects. They not only hear and feel sound but see it using special glasses. Among many other lessons, they learn that high sounds are created by a fast vibration and low sounds are created by a slow vibration.

Phil demonstrates how to see sound in action using plastic wrap, a bowl, and table salt. The salt moves around the plastic wrap in response to the sound waves. Phil then maxes out the experiment using a Chladni Plate and sand, and he shows how sand makes different shapes based on the frequently that is emitted.

Beakman explains amplification and how sound is generated. He mentions that certain sounds are louder than others due to the amount of air they disturb. They conduct an experiment to demonstrate this concept.

Lucy informs Charlie and Linus of the early attempts at flight.

On their journey to understand how cell phones work, the StoryBots talk to a microphone. She speaks about her role in the creation of a cell phone.