Wrap your mind around a hypercube
Try to comprehend a hypercube
Attempt to draw a gosh darn hypercube
Now crawl into an imaginary hypercube

First a point, then a line and
Next we have a square
A cube is comprehensible but
Things get crazy from there!

A tesseract is a 4D hypercube
A penteract is a 5D hypercube
A hexeract is a 6D hypercube
An enneract is a 9D hypercube