Hi, I live in Ireland but in county Clare.
In Dublin, temple bar is a photogenic area and so is St Stephen’s Greene. That’s where a good row of shopping is, including the Irish
Disney Store (highly recommend, it’s 3 stories). Guinness Storehouse is a must because of the view up top. If you want some entertainment, the really big Riverdance company is back to performing this summer/autumn, and they are still selling tickets in Dublin on Ticketmaster. Kilmainham Gaol is a great historic place to visit if you want to learn more about the troubles. St. Patrick Cathedral is fantastic and you can even visit during a ceremony which includes a lovely choir. Dublin Castle is in the city but Malahide or Powerscourt nearby are cooler. Dublin Zoo is next to Phoenix park (park that is like triple the size of Central Park in nyc). Dublin Zoo is nice, like any other zoo, but something fun for kids. I’d recommend going into a pub to hear traditional music and get Irish pub grub…get the Yorkshire pudding and sticky toffee pudding, yum!
If you’re there for a few days, tour companies or public buses Bus Éireann can take you out of the city and back. I recommend Cliffs of Moher of course. Beautiful cliffs that have a fun activity Centre. Galway city is fantastic for traditional pubs and shopping fun. Connemara is full of thatched cottages like in Tully Cross. Glendalough is a gorgeous town surrounded by Irish mountains and lakes and is so scenic and beautiful to hike around.
Obviously there’s so much to see. I hope you and your son have a great holiday.
Just to warn you, please check on car rentals before you attempt that route. I’ve heard car rentals are highly inflated right now so you may need to resort to using just public transportation and tour companies. Public transportation is great though. Possibly get yourselves a Leap Card to make hoping off and on the buses and Luas easier. Btw, the taxi app/company is called ‘Free Now’ and there is Uber too of course.
Good luck
