Six days left in your vacation and you're running out of Lifehacker posts to read. The only games at your parents' house are Sorry and Monopoly. Try Eurogames, the European style of tabletop game that isn't so competitive or chance-driven. The site Happy Meeple replicates the board and card games Finito, Hanamikoji, Lost Cities, Level X, Glastonbury, Migrate, Keltis, and Siberia.
Each game includes a tutorial for new players, and it's a great way to test out a Eurogame before you shell out fifty bucks for the physical version. Happy Meeple does a decent job replicating the cosy look and feel of the games.
For more games, a Metafilter user points to Board Game Arena, which hosts Carcassonne, Hanabi, Puerto Rico, Love Letter, Seasons, and over a dozen other games; and Yucata, which hosts dozens of games including Pompeii, Arkadia, and Space Mission.
So even if you didn't bring a physical copy, you can teach your family a game that isn't about slowly bankrupting each other with dice.