"Straight Arrow - Distance Signals"
Got us to talking about what it was.
Nabisco made a radio and in-box promotion out of the story of an orphaned Indian child raised by non- Indians... you get the picture (not very PC, but this was 1949)
The cards were the dividers between layers of the shredded wheat and they were also available as a book.
During the conversation, my Mom went and got this
It's very abused, One might even call it ratty, but it was one of her favorite things as a child. They didn't have a ton of toys and this would've been a luxury
She remembers getting it free with a bunch of box tops. C. 1949 or 1950.
I found a web site that has a ton of info on this as well as pictures of the series of cards. Kinda neat and lots of information. A real look into life as a kid in 1950 America.