Are there more grammatical explanation?

Question

Especially those with "que" followed by noun.
I can still wrap my mind around and understand "Qu'est-ce que c'est?", but "Qu'est-ce que c'est que un stylo", how are they connected with "que"?

Forgive me if I wrote some sentence wrong, it's really kind of weird for me to remember 😂

Accepted Answer

Bonjour Myth,
That's a fair question! ;-)
The first "que" (i.e Qu') means "what" while the other two (i.e que) mean "that" as explained in the lesson:  what is it that it is that ...
Qu'est-ce que c'est qu'un stylo ? = What's a pen? (What is it that it is that pen?)
I hope this is helpful.
Bonne journée !

Answer

Don't attempt a word-by-word translation of that. Just take it as an idiom.