Thank you FairLady and KHS for responding. Yes, I want to let the parent of the child know. By inserting the words "a little" , does that mean the child only urinates in the pants? What if the child actually "defecated" in the pants, can I use the words "a big" accident?
It also keeps them from panicking, so they don't think their child has had a serious accident resulting in an injury. It's a way of being considerate, since some parents can be anxious about their child's/children's safety when they are out in public.