There are a lot of community guides on Boardgame Geek for doing this with foamcore, and cardstock. Search for "boardgame_name insert foamcore BGG" and you'll ge

There are a lot of community guides on Boardgame Geek for doing this with foamcore, and cardstock. Search for "boardgame_name insert foamcore BGG" and you'll get a hit for most games.