Mechanical pencil
When I was in elementary school, I remember watching a National Geographic movie on 'The Invisible World.' The viewing was spread over several days, and while others passed notes and folded cootie catchers, I was completely absorbed by the creepy world of dust mites and other invisible creatures exposed by National Geographic's microscopes.
I feel that same sense of total wonderment/creeped-outedness when looking at the electron microscope images from microscope manufacturer, FEI. Their flickr stream provides a fascinating series of gross and awesome images of unseen life that surrounds us.
For those of you that remember the same Nat Geo video and are dying to re-capture that magic, don't worry, the entire thing is available on YouTube for your viewing pleasure.
An 'Acari' that develops on several French cheeses including Mimolette...eeps
Pollen
House bug
Spider skin
Gecko leg
Head of a moth
Mosquito eyes
Birch tree pollen
Artery with red blood cells