@S0619212 - this is a great camera, but as several of us have said in your other thread about a PTZ, I think the field of view would be too tight for that location, plus you lose the advantage of the great zoom this thing has.
I have the 4MP equivalent of this camera and it works best at distance viewing. Even for my front yard zoomed all the way out I cannot see property line to property line left to right at the street. My lot is 80 feet wide at the street 50 feet away from my camera and I cannot see my entire front yard zoomed out - I wish I could zoom it out just a little more. You will miss out on a lot of the backyard with this camera. As I mentioned in your other thread, my lot is a typical subdivision lot (80 feet by 175 feet) and this thing in the backyard is overkill. Zoomed all the way out, I miss well over half of my backyard. Looking down at my 20'x30' patio from the 2nd floor, I only see a roughly 10'x12' portion of my patio when zoomed all the way out. Yours is a one story, so it will be even tighter.
As far as tracking, it will pick one object to track and does a very good job at it. But the camera has to see your kid first before it can track and unless your lot is 200+ feet deep, they will be so close that they camera will have trouble tracking once it zooms in.
Can you post a picture standing at that corner of the house looking at your backyard to further confirm this camera would be overkill for your situation? It's a great camera and I recommend it fully, but like every camera, it has to be placed in the right situation/location.