Four-year-old Lily, right, with her parents and baby brother at the site of her amazing discovery.

Back when Air Mail Pilot was young, finding a feather or a quarter or a banana slug on the sidewalk was a big deal, believe it or not. Today’s kids are far more discerning when it comes to randomly discovering cool things just lying around on the ground. Take Lily Wilder, a four-year-old who lives in Cardiff, Wales.

Last January, Lily, her father, Richard, and their Jack Russell terrier, Biddy, were walking along a rocky beach at Bendricks Bay, on the southern coast of Wales, when Lily said, “Daddy, look!”