My Meijer (Holland, MI) had a bunch of them too for $1.99. I went with cheat sheet in hand and found it almost impossible to decipher the bumps. Some packages had no bumps at all. At any rate I picked up 2 with different bump patterns and will see how well I did "code cracking" Christmas morning.
There was one package someone had ripped open so you could see the figurine inside....it's bump pattern didn't look like the cheat sheet said it should so I just gave up. I would have bought more if I had any confidence at all that it would work.
On a side note I wonder if they'll go on clearance after Christmas since they're in the stocking stuffer bins.