I remember a book with very simple line drawings. I only remember the first line: “When Nora(h) was six years old, her parents decided to let her go” and a drawing of the parent holding on to Nora’s foot as she floated away to her adventures.
I read it at my friend’s house when I was about six or seven so mid-1970’s.

Anything you can do to help me hunt it down is much appreciated!