Despite the fairly extensive literature on the developmental benefits of youth's participation in organised, out-of-school activities, little is known about the participation of school-aged children with physical disabilities in formal recreation and leisure activities, both in comparison with their participation in informal activities and with children who are typically developing. Enjoyment of formal and informal activities was examined for 427 children with physical disabilities and 354 children without disabilities, aged 6-14 years. It was predicted that children without disabilities would report significantly greater enjoyment of formal than informal activities, whereas this would not be the case for children with disabilities. This prediction was confirmed. Children with disabilities also participated in significantly fewer formal and informal activities, and participated in these activities less intensely than did children without disabilities. The mechanisms responsible for psychological engagement, enjoyment, and the developmental benefits of participation in activities are discussed, along with implications for research and clinical practice. (Contains 1 figure and 5 tables.)