The stories behind the projects are as varied as the 480 projects being presented by over a thousand students.
The Young Scientist Exhibition, which was opened by An Taoiseach Bertie Ahern, featured a humanoid robot called Asimo.
Built by Honda, he's a humanoid robot.
Projects range from controlling your oven via a mobile phone to a robot that can locate land mines. Participants Vincent Heffernan of Our Lady's Secondary School Templemore, Vincent Grace of John Schottus School in Donnybrook and Catherine Mulcahy of the Ursuline Convent in Thurles tell RTÉ News about their projects.
Previous holders of the title of Young Scientist of the Year are also in attendance to help celebrate the 40th year of the exhibition.
An RTÉ News report broadcast on 7 January 2004. The reporter is Sineád Crowley.
The winner of the 2004 title was Ronan Larkin from CBS Synge Street, Dublin.
Young Scientist Exhibition (2004)
