Delighted that Todd revived this thread, and coincidentally enough, he did so with one from a set of cards we wanted to show off:
Funny thing -- we're sure you're right and that those were on Team Flakes -- but we remember cutting them out of the backs of boxes
of some short-lived Bugles/Doritos-like snack food with a name like Zonkers or Zippity-Doos or Fiffle-Faffle or something...
Back to Bob's original post and the invitation to display some non-baseball, non-sports, '60s oddities as well -- does anyone else
remember these?
They came with a thick slab of minutely-ribbed transparent plastic, same size as the cards, which you'd place over a card
and then subtly wiggle them together so that the shaded areas of the image would appear to be solid and moving.
Kind of a sadistic set, really, with helpless tiny humans being eaten, crushed, or incinerated by dinosaurs, dragons, and giant robots...