Unused Vintage Greeting Card - Merry Christmas | Children in Sleigh

Dating to the 1950s/1960s or so, may I offer this mechanical Christmas greeting card featuring children in a sleigh. While the card is mailed flat, it is up to the recipient to turn it into a 3D self-standing piece. I have only shown you what the piece will look like when folded - I didn't do a complete construction. Size when flat is 5" x 6" approx. Unused condition - no writing. Made in the USA but by whom, I do not know. Just too cute!