Yep. Someone created a real life Mjölnir. I mean, in all fairness, it doesn’t have all the awesome super-power-y abilities, but it IS a hammer, it LOOKS like Mjölnir, and it can only be lifted by its creator. Check it out:
tl:dw? Metal surface + electromagnet + fingerprint scanner = only the creator can lift it.
Source: IFLS, as usual.