Useless Gadgets

I've long been a fan of silly gadgets, but during my visit to Korea I think I managed to find the most useless gadget yet. It's a solar powered LCD keyring. Basically, it's a tiny LCD screen that displays a small picture of a korean flag. It's powered by solar panels on the side. If it doesn't get enough light, then the picture goes off. When it is on, it never changes. So, most of the time it shows a static picture, and occasionally it goes blank. So slightly less effective than a coloured piece of card, then...