EVER imagined what it would be like to become ''invisible''? Students from Salesian English School made this dream come true with an excellent science project, which won them the first prize in the Proposal Competition of the 27th Joint School Science Exhibition (JSSE). Inspired by the film Predator, the 18-year-old creator of the project, Arthur Wong Chun-Keung, said: ''We tried to utilise available technology to do something which had never been done before. ''We also wanted our project to focus on the theme of the exhibition - Dreams Become Reality. So we used the theory of light deflection to make part and even whole of the human body invisible. ''It is more like a delusion of eyesight or magic,'' said Chun-keung. ''One medium, be it a mirror or a light receiver, will deflect or absorb the light from an object. Then another medium will radiate the same colour and amount of light, making the object between them invisible,'' he explained. ''With amazing science projects of this sort, the annual JSSE has become not only an important event for schools but also for Hong Kong,'' said Professor Poon Chung-kwong, director of Hong Kong Polytechnic, at the opening ceremony. As Hong Kong became more and more democratic politically, it was vital for locals to be more objective and open-minded, he said. Professor Poon believed that through such projects, students approached the world in an open-minded and objective way. Budding scientists from a total of 30 local secondary schools took part in the event in addition to three overseas teams from China, Taiwan and the Philippines. The projects on display also gave visitors an insight into the future life, especially that in the outer space. For example, an eye-opening project created by students from Queen's College showed, human beings in the future may be able to enjoy an interstellar voyage to explore and finally dwell in Mars (by St Clare's Girls' School). Six titles including the overall champion award are yet to be presented. The fun for visitors on the opening day was not limited to feasting their eyes at the demonstration booths but they were also expected to vote for the best project this year. The remaining winners will be announced during the closing ceremony tomorrow.