Hundreds of events are taking place around the country to mark the national day of creativity for children.
Cruinniú na nÓg will see a range of free activities happening in villages, towns and cities, throughout the day.
Organised by Creative Ireland, the initiative has been running since 2018.
For the second year in succession, much of the programme is being presented online, due to ongoing public health restrictions. But a number of outdoor, socially distanced events are taking place too.
Organisers say the main aim is to enable the creative potential of the country's children and young people.
Events in each county are overseen by the local authority, with workshops, readings, performances, tutorials and concerts scheduled from early morning to late night.
As well as an extensive planned programme, volunteers have been working with communities around the country to devise their own events, that can take place in line with current health restrictions.
These include a 'Céilí in the Kitchen', with participants organising a celebration of traditional music in their own homes. A similar initiative last year saw dancing in kitchens all over the world.
The country's young musicians are also being given a platform to showcase their talents, with performances being aired throughout the day on the RTÉ 2XM digital radio station. A number of special 'Garageland' programmes will be broadcast, featuring work by singers, bands and composers from all over Ireland.
In Galway this evening, a six-hour online concert will be transmitted, comprised entirely of new music from local artists.
The Éalú event is one of a number taking place in the city, as part of Cruinniú na nÓg. Organised by Youthwork Ireland, it brings together young musicians from all over Co Galway who have recorded performances of new, original material.
Loretta Raftery from Galway City Council's Creative Ireland team says the day's events are hugely important in helping to unlock creativity and give children a chance to unleash the talents they have.
The council has selected climate change as one of the themes of the activities it is lined up for the 2021 Cruinniú.
Local primary school pupils have been working on poems which will be displayed in the city and this afternoon, a youth forum will gather in Merlin Park woods to discuss how efforts to tackle global warming can be enhanced.
Full details of the Cruinniú na nÓg programme are on the Creative Ireland website.