Forget about this explanation. The tale of the expanding universe is just the interpretation of an interesting solution of Einstein's famous equations of "gener

Forget about this explanation. The tale of the expanding universe is just the interpretation of an interesting solution of Einstein's famous equations of "general relativity". They are interesting because it matches observations. That discovery made people so crazy because many of them did not believe in Einstein's novel equations. That's something a five year old could understand. But it won't give him anything because the idea of big bang etc wasn't explained at all.