Yeh I've done a fair few first aid courses as part of my offshore survival but they didn't cover choking, CPR on a child would be a nightmare as they are so frail. For them to be worth while I think you'd have to refresh every year at least. Makes you think though, it is my worst nightmare that something hapens to my daughter and I am always banging on at my wife about smoke alarms and checking the cooker is off etc.