"I am a prototype, not a smiley face."

Here is  a prototype possibility for a barometer that is portable, novel and easy to decipher.  It would have a simple hook device at the back, with which it could be attached to a bicycle, bag, jacket etc. I used a glue on the "meter" (smiley-face) part to diffuse the light a little bit, but I think further diffusion is necessary to get a sort of continuity with the light, so i think i'll try cotton.