|Maybe a Blake Lively picture would be better|
Take your dad to one or more of these. Get him some heavily salted and buttered popcorn, some twizzlers, and a soda so big that he misses part of the movie due to having to use the bathroom. The most important part, go with him. Don't just tell him he has the day to himself and send him to the theater. Go with him and enjoy the movie(s).
Of course if you wanted to throw some power tools or electronics in on top, I am sure your dad wouldn't complain. And, if you are taking him to see Green Lantern, you might as well get him a power ring.