A daycare center in St. Louis, Missouri is facing a lawsuit after video surfaced showing teachers encouraging young children to fight each other.

A 10-year-old used his iPad to record video from a different room after he heard his little brother crying. The footage shows toddlers at the Adventure Learning Center throwing punches while teachers jump up and down excitedly and put Hulk fists on the kids' hands.

The surveillance cameras at the center captured about 30 minutes worth of fighting. At one point a kid is seen punching another child's head into the floor.

"My son was very afraid," Nicole Merseal told ABC News. "He didn't understand why his best friends beat him up. These are children that he's been around for a couple years."