i know they don't really look like 20 of the same object, but they are all writing utensils. i thought it would be interesting to see how different things can be that are used for the same purpose.
differences.
-range from 2 in. to 6 in. long
-some use lead
-some use ink, or some kind of fluid
-some have lids
-others you can click or twist open
-different color exterior
-different purposes (coloring, writing, highlighting, etc.)
-some you can refill
-some will run out and be useless
-different colors when used
-different thicknesses when used
-some can be erased
-some are permanent
-some have writing on the covering either indicating its qualities, or advertising.
-some indicate writing color by exterior color
-some can be taken a part and put back together
-some require sharpening
-some are used to compliment others
-different exterior designs
-some have rubber grips
-made with different materials (wood, plastic, etc.)
-some are more fragile than others
-some have been used, others are new
-came from different places
-even though some look different the writing will be the same
that's what i observed.