I hate to be harsh but it was total ignorance on the fathers part. No one should allow a child to be near machinery such as that. I am sorry for him and the family for the loss but this death was unnecessary and could have been prevented.
I used to operate a chipper in a sawmill and I know what they can do. They pull as they cut and if it catches you you don't have a chance.
I doubt the poor child felt a thing thank god. Very sad news!