Hypercube!! i need help!!?

So im a girl who's very much into space-time and dimensions n all that stuff... i've been searchin alot about the 4 dimensional cube aka the hypercube n i just want a very simple and easy to understand concept of the hypercube... N the thing is that im just in 9th grade... i mean it really fantasizes me to really know if a concept like 4 dimensions is acceptable to the limitations of the human mind...