Youth clubs have cancelled judo and karate courses to safeguard children against swine flu. The move is just one way the flu epidemic has affected the summer holiday plans of many people and groups. The Boys' and Girls' Clubs Association of Hong Kong has stopped judo, kickboxing, karate and dancing classes. 'It is difficult for students to wear a mask when they are dancing,' corporate communications officer Jackie Li said. Class sizes have been reduced to guarantee good ventilation. 'Our classes used to have 30 students each. Now we have cut several places,' Ms Li said. Katie Lam Pui-sheung of the Hong Kong Federation of Youth Groups said contact sport classes might be cancelled or groups made smaller. The Hong Kong Taekwondo Grace Association, which has outlets in Mong Kok, Fanling and Tung Chung, has cancelled its annual summer contest next month for all members, including 100 youngsters, as a way to minimise the risk of swine flu infection. But the association will continue regular classes during the summer holidays. 'The contest in summer is always a major event for us that involves all our students,' coach Anthony Li On-tung said. 'It's disappointing, but the risk of catching the virus is bigger than for normal courses.' Meanwhile, other courses have been introduced for the summer. The British Council has rolled out a course in which students learn English from creative media such as songs and storybooks. It is in response to the new English syllabus to be adopted in the coming academic year. Junior soccer lovers are catered for by a camp organised by FC Bayern Munich and Allianz Global Investors. Two Hong Kong youngsters aged 14 to 16 will join 30 other teens from around the world next month at a five-day soccer camp in Munich, Germany. Quizzical children are encouraged to join 'little scientist' courses. Hands on Science Outreach provides a course in which kindergarten children build model bridges and one in which primary pupils learn simple physics theories by studying optical illusions. Because of the recent rioting in Urumqi , the Hong Kong Playground Association has cancelled a study tour to Xinjiang . The association conducts tours to mainland regions where there are ethnic minorities. 'It was planned that Hong Kong children would interact with Xinjiang children,' senior development officer Kwok Yin-man said. But the tour has been cancelled because of safety concerns. Swine flu has also forced some student-oriented businesses to change their marketing strategy for the summer. The deputy general manager of Hong Thai Travel Services, Daniel Chan Kin-pang, said the agency was not organising any overseas study tours, which had proved popular in previous years. Instead, it was promoting 'family tours', with prices 10 to 20 per cent lower than at other times. 'Many parents think it is risky for their children to go overseas alone in face of the spread of the epidemic,' Mr Chan said. 'However, they are not worried if they go with their children, as they can take good care of them.' But Travel Industry Council executive director Joseph Tung Yiu-chung said cheaper family tours could not compensate travel agencies for the loss of more expensive study tours. Study-tour business had dropped 70 per cent, he said. Although the threat from swine flu was less than expected, it was not feasible for agencies to plan new tours at this stage.