Joined: July 2005
As the somewhat overprotected only child of older parents, I developed quite an imagination as a kid in order to keep from being bored silly. I could also distinguish physical reality from fantasy quite well even as a preschooler. My understanding, from my extremely limited exposure to either the child-development literature or actual kids, is that this ability is the norm rather than the exception (in other words, kids with imaginary playmates are almost always exhibiting normal creativity, not delusions).
Interesting question: Do kids have an innate ability to think logically without training, and if so, how and when are they most susceptible to the superstitions of adults?