No need to hide the kids. They’re fossilized.
But so reports the science journal Geology:
Large quarrying surfaces of roofing slate in the Arouca Geopark (northern Portugal), formed under oxygen-depleted conditions, have yielded a unique Ordovician fossil lagerstätte that reveals new information on the social behavior of trilobites. It provides several of the world’s largest trilobite specimens (some reaching 70 cm), showing evidence of possible polar gigantism in six different species . . .
Ain’t life grand?