I just use this mic paired with these headphones and I love them when playing on my PC.

Some ideas:

• A multitool. Not sure this particular one is any good or not, but Leatherman is a good brand.
• Cast iron dutch oven
• A Roku
• Some decent headphones

A lot of video games and "grown-up" board games are in the $30-$50 price range too, if your in-laws play.