Family History Map

I want my son to know at least four generations of his family history by heart. For me, it's easier to associate people with places than it is with names. Just in case he's the same way, I'm marking the birthplaces of his ancestors from the last century on a world map. That comes out to 30 different birthplaces, and because the biggest box of pushpins I could find only had 14 different colors, I used one color for each set of parents. Geography was my favorite subject in grade school so that's partly to blame for this project. I'll probably have my son memorize his continents and the locations of a decent number of countries before he starts Kindergarten as well.