LEGO Master Jessica Farrell joined Dan Dooner on Let's Talk today to discuss Cruinniú na nÓg which is taking place this Saturday.
It's Ireland's national day of free creativity for children and people under the age of 18.
Jessica has re-built historic Longford landmark St Mel's Cathedral using LEGO.
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It will go on display this Saturday at Longford Library.
She told Dan how she became a Professional LEGO instructor:
