ESF Summer Day Camp in Philadelphia is considered a leader in children s summer camps. Michael Rouse and Bill Rouse founded the company in 1982. The idea for ESF, which means for education, sports, and fun, was carefully planned programs and facilities and its emphasis on individual achievement in a family atmosphere. The day camps are designed for children ages four to eight with activities including swimming, sports, project discovery, arts and crafts, world tour, and creative and performing arts. Sports camps are available for athletes and feature a different sport each week. For boys and girls ages nine to 15, the company s senior camps offer swimming, sports, art and true-life adventures.