CPR can be a life-saving technique. It can bring a person back to consciousness or keep their body alive long enough for more powerful medical help to arrive. It is something that most everyone should learn how to do and it’s really not that hard. There is always some risk to the patient when performing this action (bones in the chest could be broken due to compressions) but that risk is multiplied tenfold when you are talking about performing CPR on a child.
The problem with a child is that their body is smaller, and the younger the child, the more susceptible they are to broken bones. Working too roughly with a child can mean collapsing their chest and worsening the situation. There is also the risk of over-inflating their lungs. As their lung capacity is smaller than that of an adult, it is actually easy to literally burst their lungs by breathing too deeply into them.
Therefore, special care must be taken when training others (or when learning) to perform CPR on children. The supervision on an experienced instructor is a must and the aid of CPR manikins (child sized) is also necessary so that one can get the proper feel for how much pressure to apply and how big a breath to give. With these things well-practiced, then this procedure can safely be applies to victims of any age.
This is not meant to discourage anyone from trying to help in the event of an emergency. I’m only trying to make the risks known so that adequate care can be taken should a situation arise. In reality, the only preparation that is sufficient is professional training in the procedure.