As I see it, Adam and Eve were created without sin in them. They were given perfect health and perfect bodies with the gift of living forever on an Earth designed for their comfort. They still had human traits like free will, but they had no fear, no hatred, or any other quirks that come along with them. As a simple test of obedience all they had to do was not eat the fruit of one tree. Seeing as it was a test they must have had the option of disobeying God, right? But they had no reason to question Gods authority until Satan came along.
