Holiday Gift Ideas For Parents

I need to buy something nice for my parents, a single present they can both enjoy, for under $50. They are 67 and 69 years old, with standard American tastes. Any ideas? One thing I thought of was the movie we all saw over T-day weekend (Outsourced) because they both loved it. I haven`t seen many modern movies, especially comedies, that appeal to that age group without being directly targeted to them (a la Grumpy Old Men), so it was nice to find a movie that is good, simple, funny, and touching without being full of sex, flash, and violence. The other present idea I`ve mulled over is a pair of lamb`s wool slippers, but one pair is in my price range, two, unfortunately, is not.