Hi, Jeremy! Of course I'm going to say yes, they are worth it but let me describe them a little and then you can decide.
Nancy Drew games are first person, point and click pc games with lots of puzzles. I enjoy the puzzles and the traveling done in the game that offers some educational experiences as well. One game takes you to Japan where you stay at a ryokan and another teaches about Germany, tornadoes, Ireland, etc....my husband is an avid pc gamer who rolled his eyes when I told him about them but once he played he was hooked! If you're interested check out herinteractive.com. there you can order hard or digital copies for only ten bucks