Having whittled down the entries for the BT Young Scientist and Technology Exhibition from 2,031 to 550, the judges will have a tough job crowning the overall winner tomorrow night.

The energy savings achieved by Scoil Cholmcille from work on its second flag have been considerable.

Walking to school may be tough work for little legs, but pupils at Scoil Cholmcille take it all in their stride, Education Correspondent Niall Murray reports