The packets allow the owner to do a trick based on Larry Becker's "Will The Cards Match?" from the award wining book Stunners Plus first published in 1992. Two spectators are given the packets of cards (one red - one blue) and then they will move cards from the top of their stack to the bottom, one for each letter in the sentence, "Great magicians Are in SAM." The order of that movement will be at the pleasure of audience members.
Once again the sentence is spelled and cards moved in any order. Again the top cards match. This continues until the last cards match. The effect involves a stack and is self-working. While clearly not scaling cards per se, I like them anyway and I've added them to the collection.