"Kingston didn't know where he was going. All he had was an envelope with a spending card in it.
"When he got to Toyworld there were paparazzi, a red carpet entrance, plus posters on the walls welcoming him in. It just blew him away. He was able to go and pick toys randomly off the shelves."
Napier Toyworld owner David Copestake said a red carpet and bollards had been set up at the entrance to his store, with an amateur photography club playing the part of bustling paparazzi.
"I know Kingston's been going through a pretty rough time for the last few years. We were happy to play a part in it."
Leaving the store with armfuls of superhero and dinosaur toys, Kingston got back in the limo - and was transported to the playground at Marine Parade for a lavish family picnic.
Mr Karangaroa said it was a day the family would never forget. "The kids played games all afternoon - they loved it."
The Make-A-Wish Foundation has been granting the wishes of children with life-threatening medical conditions in New Zealand since 1986.