Most boat operators state that Skellig Michael is not suitable for children under the age of 12 and will not take kids younger than 12. Kara was 11 (just 2 months shy of turning 12) when we visited and she did great, although she has lots of experience hiking and walking along narrow paths like those on Skellig Michael. If you plan to visit Skellig Michael with kids, they have to know to stay on the path and stay away from the edge. This can be a dangerous place, especially if it has been raining.