It was the 1960s (I'm guessing!) and the Space Race was underway, so even Santa needs a rocket-boosted delivery system.
I bought a box of cards from a thrift store in Louisiana some years ago, but forgot about them. This image is on the box cover in red, and this is one of the "create-it" cards inside. There were several other vintage cards--probably from other series in the box. This card was printed in full color on three sides, and has instructions on how to make your own space ship!