Obsidian

On the way home from Target….

TB: Mom, have you ever seen obsidian?
Me: Probably.
TB: I know how to make obsidian.
Me: Really?
TB: Sure.  You just mix water with lava.
TG: No.  That’s not how you make obsidian.  You can’t make obsidian.  It is a metamorphic rock made from lava under pressure.

*Momentary silence*

Me: Word.

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