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
The Only in England photographic exhibition has launched at Palace Arts on Redcar Esplanade.
A Northumberland man who's shed nearly 14 stone in ten months hopes to take part in the Blaydon Races - something he's always wanted to do.
Crimestoppers has offered £10,000 for information in connection with the murder of Robert Hutchinson who disappeared three years ago.