In one day your life changes, it turns completely upside down.
After everything, Kostya's wish was more than we could ever have expected.
It is difficult for Kostya to say which part was his favourite, he loved it all, but for me it was seeing him so happy.
It was a truly amazing wish."
More top news
A teenager has told ITV News how he and a friend braved freezing conditions to rescue a man who had fallen into the River Tamar.
A single mum who was left an anonymous note with a fiver by a stranger on a train has been able to thank her benefactor in person.
Second blast of wintry weather forecast for the UK says weatherman Alex Beresford.