"Oh, uh, not that far," Abby says after a moment. She remembers digging closer to the surf with her sister, trying to race to reach the water at the bottom before the tide washed the whole thing away. It stings a little, the memory, but she's grown awfully good at hiding it behind a smile. "Since the ocean's right over there, I mean. But, yeah, the damper the sand the better. The dry stuff'll just collapse in on itself."