Volcanoes

21m

Harrison gets permission from his school to build a very large volcano and with the help of a real-life volcanologist he creates a grand finale in the form of one of the largest mentos and cola eruptions ever concocted on television! Viewers learn what to do if the earth starts shaking.

Flight

21m

With the aid of a wind-tunnel and a four-time national radio-controlled airplane champ, Harrison takes to the school yard to discover why some things fly better than others and viewers find out what it really takes to leave the ground.

Weather

21m

Harrison is visited by a real-life television weatherman who shows us how he predicts the weather. Viewers will learn how to gauge wind strength and direction from famous storm chaser George Kourounis as Harrison talks to him live from a location in America's Tornado Alley.

Sickness

21m

Harrison is visited by a microbiologist who helps him take a close look at an invisible world and figure out how to stop viruses from hurting us. In the name of science, Harrison performs a top secret experiment at an elementary school to find out how quickly germs can spread. Viewers at home learn how to grow their own fungus.

All Animals Big and Small

21m

Harrison sets out to explore why it is that some animals evolve to be big, while others evolve to be small. He is visited by a miniature horse and its foal who help him find out why animals are bred to be different sizes. Viewers are encouraged to test their own ability to make themselves seem as big as possible!

Electricity

21m

A physicist visits Harrison to explain how electricity is generated, and teaches us how it can be conserved. Viewers can take part in a fun experiment to see electricity at work in their own bodies.

Language and Communication

21m

Harrison is visited by a very special guest - a parrot - and he tries to figure out if he can understand what it's saying! Meanwhile, viewers get to test out their ability to communicate with dogs. Harrison also discovers why humans speak so many different languages.

Tools

21m

An anthropologist and real-life expert in prehistoric tool-making teaches Harrison how to make Neanderthal knife blades and to paint like a "cave kid". Harrison invites kids at home to join him in making simple machines - a wedge, an inclined plane, and a lever - using nothing more than a sheet of paper.

Sound

21m

Harrison is joined by rapper and musician Kid Koala, a special guest canine, and opera singer Lindsay Michael. Individually, these experts help us find out about the delicate mechanisms that help us hear. The special guest canine helps Harrison figure out whether dog whistles really are silent, and Lindsay Michael tests out whether a person can actually shatter a crystal glass with their voice. Viewers at home find out if they have bat-like hearing!

Oceans

21m

Finding out how crucial the ocean is to our ecosystem, Harrison discovers that although monsters might get the attention, it's the little things that count. For example, a tiny creature called phytoplankton creates half of the oxygen that we breathe. Using potatoes, a marine biologist helps Harrison figure out how fish drink!