Now all animals with ears hear sound, which is made up of invisible waves that create vibrations in the air. High-pitched sounds make fast vibrations, and low-pitched sounds make slower vibrations.

There's four different animals, each inspiring their very own ... Wave your arm imitating a trunk in front of you. Now, use all those sounds and actions to build up a rhythm.

But mimicking the sounds of animals isn't as easy as woofing or purring. [Marko purring] Though he can do that, too. Picking the right sounds involves carefully examining both objects and surfaces.