Kate wore a shimmering dress by Missoni, featuring a midi-length pleated skirt and sheer sleeves - and the light green color pays homage to their host country.
The couple, the Duke and Duchess of Cambridge, are on a two-day trip to the British province, with the focus on Wednesday on the benefits of sport and outdoor life on childhood development.
The Youth Village, which sits on the shores of Lough Erne, caters for young children from across the island of Ireland.
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Firing across the Line of Control has killed and wounded dozens of soldiers and civilians on both sides in recent years. He also said the leaders appreciated the efforts of the forces and they always have their support to end terrorism.
The royal couple were earlier given an official welcome to the venue by Lord Lieutenant of Belfast Fionnuala Jay-O'Boyle. Children urged him on until he made it to the end and they celebrated with a cheer.
The duchess missed her first shot, but with some tips from the children hit the target on her second attempt.
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This game suited his attacking tendencies and he made the most of it. Adding that to a goalless first half produces a 15.14 double.
During their tour of the venue, the couple also met Northern Ireland footballing great Pat Jennings.
They learned about the Stay Onside initiative, which works with criminal justice agencies in a bid to reduce offending rates.
Their final visit of the day will be to Belfast Empire Hall to celebrate "inspirational young people who are making a real difference in Northern Ireland".
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England were outstanding in the first two games. "I think we had four disallowed tries in the first two games". On fine margins you make one mistake and it costs you a try and that ultimately cost us the game.