This one falls pretty well into the neat stuff category. Originally begun as a reseach project it’s now possible to buy an electronic version of the famous enigma machine.
The unit is completely compatible with the M3 and M4 enigma and has all the features of the original: Wheels, lamps, keyboard and the Stecker peg boards
The unit can be bought from a number of places worldwide including the Bletchley Park. Check it out here.
At around £119, it’s not cheap, but compare that with the estimated value for an original!