If someone wants to kill they do not need a gun. They can kill you using other things. A knife, a car.
Americans probably have it too easy when it comes to obtaining the firearm. But guns themselves aren't the problem. People and their lack of education, mental health problems is.
You can give a gun to your child. Teach him/her how to clean it. How to put it apart, how to put it together. If he respects and undertands the power and capacity of damage it has the danger goes way down.
Acidental shooting would not happen if people knew how to use the weapon properly.