The Velveteen Rabbit(1985)

A boy receives a Velveteen Rabbit for Christmas. The Velveteen Rabbit is snubbed by other more expensive or mechanical toys, the latter of which fancy themselves real. One day while talking with the Skin Horse, the Rabbit learns that a toy becomes real if its owner really and truly loves it. The Skin Horse makes the Velveteen Rabbit aware that "...once you are Real you can't become unreal again. It lasts for always."