Charlie and Kirby head to NASA's mission control in Houston to learn how to train to become astronauts.

How recycling helps save trees; visit to a paper mill and a recycling plant.

With a soapbox derby coming up, Charlie and Kirby head to the racetrack for a crash course on race cars.

Charlie and Kirby learn all about planes on a flight in a historic biplane.

Forensic scientists show Charlie and Kirby how fingerprints and footprints help solve crimes.

Charlie and Kirby visit the quietest room in the world to learn how to harness sound.

Description DescriptionCharlie and Kirby head to Hawaii to discover the secrets of volcanoes.

Charlie and Kirby investigate various kinds of trees and climb giant sequoias that can grow to be over 250 feet tall.

Charlie and Kirby learn how to take care of Patrick's coral reef aquarium.

Charlie and Kirby explore different types of plants, from carnivorous plants that eat insects, to giant sea kelp that grow up to two feet per day.

Kirby and Charlie learn all about bees.

Kirby needs to build a contraption that will beat the school record in the egg-drop contest so she and Charlie get some advice from professional test engineers.

Charlie and Kirby learn all about electricity when their headquarters loses power.