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 Cornish Royal Navy winchman, who risked his life to save five French fisherman, has been awarded the Queen’s Gallantry Medal.
Newquay could be home to Europe's first spaceport, paving the way for commercial space travel in the UK.
A Bowhead whale - almost never seen south of the Arctic - was spotted by a diver just off Par Beach on St Martin's island.