Jake is four years old. He loves playing outside. We have a fenced-in backyard that is an excellent area for him to play in. Jake often goes out in the backyard by himself now that he can unlock and open the back door. Luckily he knows not to go out the front door without one of us with him. He’ll go out back with our dog, Chelsea, and run around and play with his basketball or football. Chelsea is not much of a fetch dog, so usually Jake throws a ball near Chelsea, then Jake runs to get the ball.