Old people are funny. They don't understand what's going on! This is an advertising truism going back to Clara Peller and beyond. Now, Kraft is getting in on the action, handing over the Twitter  and Facebook  pages for its Macaroni & Cheese brand for a couple of days to two humorously out-of-it octogenarians—Frankie, 87, and Dottie, 86. Some of the tweets so far seem suspiciously perfect ("just learned about planking. anybody know what it means?"), but I suppose we have to take them at their word. A fun piece of an ongoing great campaign by Crispin Porter + Bogusky. More videos after the jump. Here's more from the agency: "As part of the 75th anniversary celebration of KRAFT Mac & Cheese, we're turning our social network—Twitter, Facebook and YouTube—over to two 'Old Birds' we hired who've been eating Mac & Cheese for 75 years. They will be our temporary social media managers, having started yesterday, Tuesday, April 10, and going to Thursday, April 12. They'll be Tweeting, posting pictures/videos, commenting on trending topics, RTing and responding to @replies. During the three days, anyone can interact with the two ladies, named Frankie and Dottie, by Tweeting to @kraftmacncheese or using #oldbirdsnewtweets."