Tidbits
 
A donation to the Blood Bank in Dublin results in a free pint. Guinness is recommended since it replaces iron lost during your donation!

It is a biological fact that there are no snakes in Ireland, not even the tiniest grass snake. St Patrick gets the credit for this.

There is no additional sales tax added to goods items in the north or the Republic. Value-added tax will have already been added to many items (non-EC residents can claim VAT back).

Free travel is given to all Senior citizens in the Republic. This entitles travel on public buses and trains at off-peak times.

Alcohol can only be served to over-18s.

Voting begins at 18 although it is not compulsory.

Sources:
http://www.hidden-dublin.com/facts/facts01.html
http://www.hidden-dublin.com/facts/facts02.html