Just to Make It Interesting . . .
Well, what about the real world out there -- Matter and Energy, Space and Time? Well that's really a good joke on us, because we created it, or rather, ourself created it. And yes, it's as real and as material as it can be, even though it's just an image in the mind of ourself, continually changing as required by the rules of the game, which ourself also created, and by our(self's) moment-to-moment decisions on what to create.
"Stop right there!" you say. "Are you implying that we, individual points of view, are creating the material world?"