Judging begins this afternoon at the BT Young Scientist and Technology show.
In its 49th year, the competition received over 4,000 entries - an increase of 24 percent on last year.
The show, at the RDS in Dublin, opens to the public tomorrow.
The projects cover a vast array of topics from the theoretical to the practical.
There is a huge contingent of Donegal students taking part, a full list of entrants is available in PDF form HERE