It sounds funny, but there have actually been fighting rings for toddlers (some call them babies) at daycares.I'm not sure if this is a joke or not, but I hope it was a joke because the mental image of a baby fighting ring made me laugh.
Prosecutor: School director was ‘ringleader of makeshift child fight club’
A trial date has been set for a school director that a prosecutor called the “ringleader of a makeshift child fight club.”

US Daycare Workers Arrested For Running Fight Ring Involving 3-Year-Olds
Two teachers at a daycare centre in US South Carolina have been charged with encouraging children to fight and then not making any efforts to stop the violence.
