The Minox DCC Rolleiflex AF 5.0 MiniDigi is a working miniature replica of Rolleiflex 2.8F TLR camera. The viewfinder is at the top, it produces square format photos and oh, you need to turn the crank lever before your next shot. It sounds very gimmicky to me, but look at how small and cute it is! *loses common sense*
Not much bigger than a keychain? Oh, the other miniaturized cameras are equally cute too:
Above Minox DCC Leica M3 plus(SD card), below mini Hasselblad SWC (film).