Greg took a training session at the Eldon Square shopping centre as part of the launch event.
He won gold at London 2012 long jump and says now it's his turn to inspire others.
More top news
From Wednesday "legal highs" are to be legal no more, with the Psychoactive Substances Act coming into force. But what does it all mean?
A look ahead at the forecast for the Tyne Tees region.
All the songs featured in our series have some connection to the continent - but can you remember who they were recorded by and when?