OBJECTIVE:A cross-sectional survey was conducted to determine which personal and environmental characteristics influenced diversity of participation in activities outside school for typically developing children and adolescents. METHOD:Four hundred twenty-two (215 boys) typically developing Australian children (mean = 11.0 yr) completed the Children's Assessment of Participation and Enjoyment (CAPE) and the Preferences for Activity of Children to describe their participation on five activity types: Recreational, Active Physical, Social, Self-Improvement, and Skill-Based. Linear regression analyses were conducted. RESULTS:Predictors of participation diversity were age and preference for Recreational (aR² = .44); preference for Active Physical (aR²= .19); gender, school type, and preference for Social (aR² = .19); preference for Skill-Based (aR² = .25); and gender, school style, socioeconomic score, and preference for Self-Improvement (aR² = .24). CONCLUSION:Preference plays a key role in determining the diversity of participation in activities outside school.