Disney Online today announced the availability of Playhouse Disney Preschool Time Online for Mac, as well as the recent addition of new content from Disney Channel’s popular Playhouse Disney shows “Little Einsteins” and “Mickey Mouse Clubhouse.” Playhouse Disney Preschool Time Online is a learning-based premium broadband subscription service for preschool-age children and features popular characters from Disney Channel’s Playhouse Disney programming block, including JoJo’s Circus, Higglytown Heroes and Stanley, among others.