Children are in a period of rapid development. In order to develop fully, they must be properly instructed by their parents, exercise regularly, a balanced diet, a positive attitude and social skills. Social skills develop early in children's interactions with their age groups, with early contributors making friends through games. Parents should carefully choose to let the children to go to an indoor playground or to an outdoor playground. What kinds of factors should one consider about the indoor playground(playhouse)? This article gives an answer.