Sonic Screwdriver
Doctor Who’s most trusted tool is his Sonic Screwdriver. Now you can own your own. It is actually a hidden ultraviolet pen with a special UV light. With it, you can write messages that only can be revealed by the Sonic Screwdriver. It not only does that, but also has sound effects, a spare standard ink nib, and a wip on wipe off psychic note pad. About $20.
via Chip Chick
