Imagine you have a musical ladder with only six steps, just like the stairs you climb! But instead of going up and down with your feet, you go up and down with your voice or instruments. This musical ladder is called the "whole tone scale".
Each step of the ladder is a tone that is the same distance apart from each other, just like one step of the stair is the same height as the others. This means that if you start at the bottom step and go up, you will skip one step every time.
So, for example, if you start on the note C, the next step up would be D#, then the next step up would be F, then G#, then A# and then finally back to C again.
Because each step is the same distance apart from each other, it creates a unique and dreamy sound that some musicians like to use in their music. It's like a special musical secret code that helps create a cool atmosphere and mood in the music.