Put Two Things Together, Get A Whole New Thing
Postcard credit: The Book of Imaginary Beings (Jorge Luis Borges, 1957; cover by Peter Goodfellow, 1974).
Pin: Kory Bing, purchased from The Plesiostore.
Sticker: anti software software club, purchased from their shop.
Card: "Clever Combo" (Kev Walker, 2017), from Magic: The Gathering - Unstable, published by Wizards of the Coast.