When and why did Northern Ireland split up from Southern Ireland?
Because of a war. England wanted the 6 best counties to be part of the United Kingdom. Those counties was Northern Ireland.
Why is the Irish Sea called the Irish Sea? Why isn't it the English Sea?
It's because Ireland is the smallest piece of land so that's why it's called the Irish sea.
What are leprechauns?
They are like gods, there's one for different things such as knowledge. They are quite small and can do magic, I think.
Was Northern Ireland ever part of Southern Ireland?
What are some Irish myths and legends?
See my post about Clough Mor! A giant from the north was killed by a different giant from the south with a huge boulder. That giant is now sleeping.