Uhm, the issue here is squarely on Bash's end, not your kid's. Even the Windows command prompt is far more intuitive to learn. I know because I vividly remember how much more confused I got when learning the former.
In Windows, when you type "help", it actually gives you helpful commands: COPY, MOVE, DEL, REN/RENAME, etc. and at least the basic commands are actually what you'd expect. At least you have a foothold somewhere that you can ground yourself, and you start learning a bit more every time.
Try that in Bash, and good luck learning out how to do anything in Bash on your own. Oh, you want help? I gotchu! I'm guessing you're looking for job_spec, bg, compopt, coproc, disown, shopt, or trap? Oh I'm so sorry, you said all you wanted was to just copy a file? Haha I'm just a shell! You can't expect me to know how know what it means to "copy" a file! I can't even find that command! But if you need help, type "man -k" (what kind of a name is that??) to find out more about other commands. Oh, so you typed "man -k"? Okay, "apropos what?"??? (You, thinking to yourself: is 'apropos' even an English word?? I literally just typed in man -k like they told me to, and I got back a question I don't understand...) And on and on and on, until weeks later you realize the darn command was helpfully named 'cp' and not 'copy'...