Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Strap *this* to the back of your cat.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.



Please log in.
Before you can vote, you need to register. Please log in or create an account.

Air Pen

Write in midair!
  [vote for,

A handheld "pen" or lightweight pump that, at the push of a button, ejects a steady stream or jet of colored gas from its tip. This gas has the exact same density as air, so it hangs in midair without rising or sinking. Potentially, in an environment without any air currents, one could write or draw in midair.
DrWorm, Aug 04 2009

floatfoam floatfoam
[xaviergisz, Aug 04 2009]


       What stops the gas from moving after being ejected from the pen?
tatterdemalion, Aug 04 2009

       Very careful blowing.
DrWorm, Aug 04 2009

       would need to be a long pointer to work, not a pen... but neat [+]
FlyingToaster, Aug 04 2009


back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle