The hole seals behind them.

The two families sit around a new fire. Not the Croods’ chaotic blaze, not the Bettermans’ controlled hearth, but something in between. Sandy shares her chewed rock with Dawn. Dawn shares her clean water with Sandy.

It’s a luminous cavern. Glowing mushrooms pulse like hearts. A hot spring bubbles in the center. Sandy immediately tries to eat a mushroom, a rock, and Dawn’s hair—in that order.

Dawn stares. “You… crunched a rock.”

Grug puts a heavy paw on Phil’s shoulder. “Tomorrow,” he grunts, “we build a chair. That holds everyone .”