What are their interests?
Boys or girls?
Dublin or further afield?
Cars etc. - Mondello Park, Transport Museum
History - Kilmainham Jail,
Horses - National Stud
Bodies - St. Michan's Church, Glasnevin
Sport - Croke Park Museum, National Aquatic Centre, Greyhound racing
Dublin - Cycle!
Music - Concert, live music somewhere
Travel - Luas, DART, Train