It's tricky because there is just no way to show 4D phenomenon without a lot of sacrifice. I ended up using a combination of "perspective" for size and differing transparency and a fair amount of movement. All of these are artificial of course.
The explanation on the page takes another approach: all black and white line drawings and a lot of brevity.
But it's really a hell of a lot of fun tying to figure out how to present impossible to visualize phenomenon.
And you are not remotely too dumb: if my story didn't come through it's my fault.