Creativity refers more of an idea, and creativity hence does not necessarily need to be realistic, it can even be out-of-this-world! Invention, however, refers to the creation of an object. Invention also requires much planning and problem solving, whereas in creativity, just let it wildly FLOW!
However, both are similar in a way that both require lots of imagination!
Their relationship is that creativity starts off invention, without creativity, invention cannot/very hard to be achieved.
DOMOOOOO. <3 rarrrrh!