Sheldon Aronowritz tells us that Hallmark is releasing 19 lenticular greeting cards for this Halloween. Unfortunately, my search of Hallmark's web site doesn't show any of them. Nor does an October-dated press release I found from Hallmark mention these cards.
However, some enterprising entreprenuers are selling them, significantly marked up, on eBay, where the above images were found.
Sheldon says these "lenticular 3D, animated, and morphing cards are of superb quality. The 3D ones are OK - but the animated and morphing ones are the best I have seen - and I have seen a lot of lenticulars! They are $3.99 each at Hallmark stores."