To see my response to the first chapter of "Engaging God's World" read my response for "No right to Happiness".
In the second chapter Plantinga explains creation and what it means for Christians. Most of what he says comes from other authors and is backed up with well known biblical text, so there aren't really any profoundly original deep insights. It was all pretty straight forward, but what stuck out to me was a quote that he pulled from G.K. Chesterton: "The whole difference between construction and creation is...that a thing constructed can only be loved after it has been made; but a thing created is loved before it exists." He then goes on to explain how God is not limited by his medium, he created the world out of NOTHING. To me this just slams humanity back into their place. We can only construct that which God has already created. We can't create, we can only construct from things of this world. This shows how far out of grasp God is to our own minds. Humanity is so enslaved by time and space and this planet that we are limited by it.
This just goes to show why no one has ever come up with a solid image of what heaven will be like. The closest we can get is that "the streets will be paved with gold". Is this correct? Maybe, but unlikely. That is just what humans have used to describe something we can not comprehend. It is not of this world, there fore we can't even dream or imagine it. There will be colors we've never seen, beings we've never encountered, feelings we have yet to experience. God creates, he needs no former knowledge of things.