I have young kids. I use a semi auto with the pipe clear, takes a second to rack a round in and your kids won't be able to mess with it even if they disobey you and pick it up. By the time your kids can figure out how to rack the slide and shoot, you should already be teaching them to shoot and use it safely anyway. I figure that method is good up until the teenage years when they regress into dumbasses, then I will have to lock them up.