"A large portion of 9,566 human bones, bone fragments and teeth found on the cave floor from 2008 to 2010 belonged to individuals no older than 14 years, bioarchaeologist Michael Prout reported April 15 at the annual meeting of the American Association of Physical Anthropologists. Many of the human remains came from 4- to 10-year-olds. Because these bones are so fragmented, it’s difficult to estimate precisely how many individuals lay in the cave."
Note: "Children throughout Mesoamerica were preferred sacrificial victims, especially to water deities," according to Prout. "Because caves were associated with rain, ethnohistoric sources mention the sacrifice of children in caves."