What does it mean when you dream your child has been kidnapped?

This is a very frightening dream, but I think you can rest assured that your grandchild is in no actual danger. The grandchild in your dream probably represents yourself, that is, your inner child. This is the aspect of yourself who remains vulnerable, innocent, curious, and perhaps a bit mischievous. The dream could be telling you that your "adult" self, the responsible, hard-working, serious aspect of yourself has been allowed to steal away your sense of fun. It sounds like it's time to loosen up and let yourself be a kid again, at least once in a while. Especially when you are with that grandchild.