The Galactic Adventure Begins: Relivart's Earthly Encounters

A visitor to Earth shares their experiences, including learning the alphabet from an Earthling named Will. They enjoy writing the alphabet and space travel. A friend returns, and they discuss Earth greetings and a space adventure. The visitor invites the Earthling and their sister on a space trip, getting approval from their mother. They plan to explore from A-Z and return for dinner.

What was the reaction of the Earthling mother regarding the spaceship ride?

What did the speaker mean by 'From A-Z and everywhere in between'?