Proof that my three-year-old cousin knows more than a typical five-year-old

Aretha: You know what’s LAAAVA?
Me: (thinking that she had said “lover” in a teasing manner) No…why don’t you tell me?
Aretha: Guess!
Me: I don’t know! You can explain.
Aretha: (sighs as if I were retarded) IT’S RED STUFF IN A VOLCANO!
Me: OHHH.
Aretha: You know how it’s made? It’s so hot inside the volcano that rocks melt and come out.