I have 10 3 to 4 year olds (plus parents and younger siblings) coming to DD's 4th B'day party. We do not have a very big house and garden but we'll manage. Arranged food and party bags but have not arranged any games. Thought I would just let them run riot and entertain themselves . All, bar one boy, know each other. Please tell me this is perfectly acceptable (it is DD's first real b'day party...).