Oops! - missed this question first time around.

A Tesseract is a three-dimensional representation of a cube existing in four **spatial** dimensions which, if it is to exist in what we would describe as a dynamic universe, would have to exist in a five-dimensional space-time environment.

A better analogy for a cube in our four-dimensional space-time would simply be a series of cubes, with each cube in the series representing the same single cube but at different points along the **temporal** dimension.