There's another football world cup going on this summer in Japan for which the stars don't have to worry about groin strain. Many of them don't even have legs or feet. The competition is the sixth RoboCup. Geoff Watts meets the players and trainers, and discovers that RoboCup has a serious aim -to promote research in the area of intelligent robotics. Producer Alexandra Feachem E-MAIL: radioscience@bbc.co.uk