Creativity is making something new and unique, and involves divergent thinking rather than convergent thinking. It depends on previously acquired knowledge and intelligence, though exceptions exist. Creativity is thought to be 20% inherited but 80% developed through environment and experiences. Conditions that foster creativity include free time, solitude, encouragement, stimulating materials and environments, unpossessive parenting, and democratic child-rearing. Creativity is expressed through play, imagination, daydreaming, humor and storytelling in childhood. Hazards to creativity development include failure to stimulate it, inability to recognize it, and unfavorable social or home/school environments.