The object came with a few clues to help you figure it out.
I can be viewed on paper
I cannot be viewed in reality by your kind
I am made up of what your mind can truly comprehend
I resemble a shape many learn first in primary
It's freakishly easy if you think in a specific way.
BONUS (for people who don't mind risking not being first for more quality):
How many edges and vertices does it have, and what does it look like?