Okay kiddo, have you ever seen a guitar before? It's a really cool instrument that people use to make music. An extended-range classical guitar is a special kind of guitar that is a little different from a regular guitar.
You know how there are certain notes that a regular guitar can't play, unless the person who is playing it changes the way they hold their fingers or uses a different kind of string? Well, an extended-range classical guitar has more strings so that it can play those notes more easily. Regular guitars usually have six strings, but an extended-range guitar can have as many as 11 or 13 strings!
Another cool thing about an extended-range classical guitar is that it has a longer neck than a regular guitar. That means the strings can be longer, too. And when the strings are longer, they can make a deeper sound. So an extended-range guitar can make even more types of sounds than a regular guitar.
Overall, an extended-range classical guitar is a really special kind of instrument that lets people make even more beautiful music than they could with a regular guitar.