When I came home from work today, the first thing she said was "Let's have a coding lesson". So we started by opening our web page in the browser, using the command-line, of course: open index.html. This is honestly the fastest way I know. Then I told her to open the secret drawer and she pressed Cmd-Alt-J without hesitation.
And when I suggested that we call the tell function and give it two things (some text plus the variable p) she quickly amended
Exit insert mode, save etc. Then back to the browser. And it worked. The program printed the word "pinsesa" (almost prinsessa) and the value of the variable p on the page.