My first thought is “OMG Fashion Plates!”
These are the reverse, but I love the look of it. Now pardon me while I go design some interchangeable images of dragons and zombies and such, that I can lase in relief so my grandson can mix and match and “save” each combo with paper and crayon etching. 
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Oh wow. That’s amazing! I was not familiar with such a thing, but it’s a great idea. Definitely tag me when you show off your creation.