(Photograph) - Picture by Steve Doherty. Getting a grip:Jamie Rouse, aged three, does limb exercises on a special plinth at Sheffield`s Peto Summer School, being held at the Collegiate Crescent campus of Sheffield Hallam University. Lessons for children with cerebal palsy and other disorders are led by `conductors`flown over from the Peto Institute in Budapest, Hungary, by Paces Sheffield, a charity set up by parents to bring conductive education to the south Yorkshire city. The charity is to establish a temporary school in Sheffield later this year, and hopes eventually to open a permanent centre there.