It's a flimsy argument but the only thing I can think is the kid thought it was a joke and opened all three to make sure they were indeed all the same

In December in America we do this thing called Christmas, where you get gifts for and gather with family and friends and exchange them. Kids are often included in this despite not having money of their own, and usually receive gifts from the family like video games or other doodads.

Video games themselves are barely sold on disks anymore, while this could have all transpired about two months ago, it's more likely to be an old post immortalized into a screencap, this could be from 2010 for all we know, which is the year that game was released for the xbox 360, coincidentally.