Well, I would guess there wasn’t much else to do. Other than just, I don’t know... survive.
“Dad, what age is this?”
“It’s the Stone Age, Borf.”
“Does that mean we can get stoned?”
“No, this kind of stone means a rock.”
“Why don’t we call it the Age of Rock, then?”
“Because The Rolling Stones aren’t for 14,000 years.”
“But you said THIS is the Stone Age.”
“Shut up and roll me a doobie.”