Don't want the usual manicure anymore? How about this ridiculous fashion trend: stick-on fake fingernails that feature embedded LEDs and tiny antennas. They will pick up a wireless NFC signal and light up when it is being used.

There are no batteries, capacitors, or other connected power sources to this. The energy from an NFC signal is all that's needed to make the LEDs flash.

[Takara Tomy Arts via Akihabara News]