This is a humongous bag of Swedish Fish, which I have sealed tightly. Vivi will frantically paw and claw at the bag, or any wrapping, generally. It's one of her favorite things to do. I then pretended that I can get (invisible) fish out of the bag, and eat them.
This video is short, but I can assure you it went on for quite some time...
Next, I palm blueberries, and pretend I can get those out of the bag. Vivi ate an entire small bowl of blueberries this way.
Like I said, it's super-fun to play Baffle-A-Baby!!