On a non-specific Saturday a few months back, I was with my wife grocery shopping at our local Walmart and terrible bored.... and like any good nerd i attempted to entertain myself with fun engineering challenges. One on of the isles there were some interested "rings" hanging on an advertisement pole:

For the wonderful price of $2.99USD, I got three "finger lights". So, here we were walking around Walmart doing our shopping with me thinking about what to do with these "finger lights". As it happened, we passed the cosmetics isle and I spied the fake fingernail kits and they reminded of diffused LEDs and bingo... LED illuminated fake nails!

to be continued!