Surprisingly, no mention of Cracker Jack's 3D lenticular images, which I remember as common in the 70s and 80s. I'd imagine any kid from back then got at least

Surprisingly, no mention of Cracker Jack's 3D lenticular images, which I remember as common in the 70s and 80s. I'd imagine any kid from back then got at least one 3D photo of a gopher standing on its hind legs, with the admonition from other kids to squeeze the sides of the lenticular photo inwards so that the paper curved concave, to improve the 3D effect. (Or maybe it was a marmot: https://i.ebayimg.com/images/g/doEAAOSwFpVbV73H/s-l1600.jpg https://i.ebayimg.com/images/g/doEAAOSwFpVbV73H/s-l1600.jpg)