@Apocryphiliac If they ask a question at that age and you either don't understand the subject yourself or just can't explain it in terms they could understand it, you can say to their questions: "um, i don't know... what do YOU think?" and usually they'll use their creativity and answer the question themselves in a way that's enough to satisfy them. 🙂
@Apocryphiliac Just remember to act delightfully surprised and impressed when they give you the answer. 😉 🤭