Earth To Luna Season 5 Episode 101 Pearly Whites | Hello, hello!

Luna's family is visiting a coastal town in Japan. When their friend finds a rare pearl in an oyster, it gets them wondering . . . How do pearls get inside oysters? After talking to Grandma and Grandpa on the phone, the trio get to wondering . . . how do telephones work? They begin a fun investigation and discover electromagnetic waves!