You may want to think twice before letting your kids play in the balls found in many popular restaurants and amusement parks.
A new study shows that they are often dirty and full of bacteria.
Researchers at the University of Northern Georgia inspected six wells in the United States and found 31 different types of bacteria, according to Kidspot.
One of the wells had an astonishing average of 170,818 bacteria per ball.
Many of the wells have not been cleaned in days or even weeks, says Kidspot.
The bacteria found may allegedly cause a variety of medical problems, including bladder infections, meningitis, pneumonia, sepsis and rashes, among others.
The study at the University of North Georgia was first published in the American Journal of Infection Control.