I just wanted to make sure people keep the differences between a child's brain and an adult's brain in mind for this discussion - I doubt anyone can really say with any certainty exactly what the differences are, or which functions of the brain go online at a particular age (unless somebody is a child psychologist?). As for defining the age range - I wonder at what age (or range of ages) kids typically start lucid dreaming, and stop? I guess it coincides with when they tend to have nightmares. I wish I could clearly remember my own dreams from childhood, but I'm sure even if I did by now the memories would be hopelessly filtered through my adult concepts.