Drive in movie theaters are a dying breed, but I had a great time watching Toy Story 3 with my wife here recently.
Excellent price ($6.50 for a new movie can't be beat by any of the big movie chains), great family activity. Only downside of drive in theaters in Phoenix is that its pretty dead during the hottest months between May-September. Hope this theater holds up, as there's not too many of these around the country anymore.