Experience gifts for my nephews

[ChateauMargaux]

I have 3 nephews who live in Limerick, age 15, 13 and 10.. I would like to buy them an experinece voucher and would appreciate suggestions...

Depending on where they are in Limerick, this might be a good option:
Ballyhass
We were there a while back and had a ball. Or is there a zipit nearby?

Have a look at Nevsail water sports. They do stuff based in Limerick city and Kilkee.