Even more of a problem is the fact that the gun was sitting in the corner with a bullet in it. There are two major problems right there and that's what these parents should be brought up on charges for. If a parent buys a gun for their kid, it is absolutely incumbent upon them to store the gun properly and never have it anywhere the kid can get access to it without adult supervision and the kid absolutely must be taught and be able to demonstrate proper safety practices before the gun is ever loaded.
Yep. What moronic parents; If you have guns in the house they need to be put away where kids can't easily get to them. A 'lil kids' gun is still a gun, and while it's cute and small it can, and has, ended a life due to improper handling.
The parents need to be brought up on charges, and my prayers go out to this little guy who has to go through life aware of what happened.