Here are 17 simple animations that show how stuff works.

I particularly like the tesseract (4D cube). From my understanding, in the same way that you can draw a cube on a piece of paper you can imagine there is a glass cube that had light shown through it and the above image is its “shadow” in two dimensions you effectively represented a 3D shape in 2D, and we are able to recognize it as such because we can visualize the third dimension.The concept is the same for the hypercube, you can physically make one of these in three dimensions, but it is not a hypercube any more than a drawing of a cube is a cube itself.