He is in "intuitive thought".
A sub-stage in Piaget's Preoperational stage is Intuitive thought sub-stage, which traverses ages 4-7 years. Youngsters in this stage of advancement learn by making inquiries, for example, "Why?" and "How?" Piaget named this "intuitive thought" since he trusted that kids at this stage have a tendency to be so sure of their insight and understanding that they are unconscious of how they picked up this information in the first place.
