I had this exact conversation a few days ago, and my kid is even 6!

So strangely true... My son got scared a few years ago while watching a documentary about black holes and the death of the Universe.

I have to wait six billion years for this place to get what it's got coming?! We need to put this shit on fast forward

It's not gonna explode though, it'll slowly grow until it reaches out to the outer planets, then collapse into a white dwarf that will slowly cool for eons.