When ever there is a lot of driving to be done on a long trip I always bring something to work on. On our last vacation I decided to try Romanian Point Lace. It was really fun and surprisingly easy. I got this pattern off of a tutorial online: http://joanne-threadhead.blogspot.com/2010/08/romanian-point-lace-tutorial.html
If you've ever wanted to try some lace, this is not a bad place to start. It doesn't require a lot of materials to do and isn't too difficult.