Pensioner, 76, Held in Custody on Child Cruelty Allegations
Mr Ruben is charged with wilfully assaulting, ill-treating, neglecting, abandoning, or exposing three boys in a manner likely to cause them unnecessary suffering or injury to their health.
He was remanded in custody and is due to appear at Leicester Crown Court on 29 August.
Police said on Sunday that they first received a report that children at a summer camp on the site had become ill. The eight children, all boys aged between eight and 11, were taken to hospital as a precaution.
The Independent Office for Police Conduct (IOPC), the police watchdog, said it was assessing the force's handling of the incident.
