This is one of a series given away in Sugar Puffs a few years' ago to promote the Scooby-Doo film. It's spooky, it glows in the dark (perhaps surprisingly, given its colour) and it's from Sugar Puffs, so that more than qualifies it for inclusion here! In addition, there is an amazing effect when it is held up to the light: a rough 3D picture of the characters is transformed into a photograph. The best way I could reproduce this effect was to create a negative of it, in black and white, shown below. I think this is an example of something called a 'lithopane', traditionally made using ceramics. Thanks to Stewart for this spooky item.