As a parent of a two-year-old I found this profoundly interesting.
Simply put: if you pair reviews of board games with the age those board games are targeted at, there's an interesting correlation. Board games for children literally get better the older your child becomes.
This great article over at FiveThirtyEight explains why in full detail, but I'll give you the gist: as you might expect, board games aimed at older children tend to review better, are more intricate, and just generally are a little more interesting in general. I think there is a parallel to video games here. There are some incredible video games aimed at children (like Metamorphabet for example) but for the most part they tend to be cheaply produced en masse and a little bit low quality. The same seems to go with board games.
Perhaps the best part of this article, however, is this: despite the fact that board games for younger children aren't that great, it provides a number of top notch suggestions for each age. I'm definitely going to be using this to buy games for my own children.
Stop Playing Monopoly With Your Kids (And Play These Games Instead) [FiveThirtyEight]