Which "G"?

It’s interesting to me that some younger students confuse the register of a note. Having learned first to play “G” on the 1st string, they confuse it with the open “G” once they learn the third string.

Same for young singing students, especially if their voices are changing. Which octave are they singing in? Nothing wrong with teaching kids to sing so as long as they don’t push their developing instrument—and of course it’s great to start children on the guitar early. Just make sure it’s a small one.