Southwark's deputy mayor Sunil Chopra was guest of honour at this year's Peace Day in Tabard Gardens, marking the fifth anniversary of the death of David Idowu.
Each year the Idowu family organises a Peace Day in the park on the nearest weekend to the anniversary of David's death.
Organisations taking part in the Peace Day included Kids Company, XLP, the Metropolitan Police and Southwark Youth Service.
Firefighters from Southwark Fire Station brought their fire engine to the event and offered children the chance to sit in the cab and try out the siren.
The Peace Day marks the end of the Twenty Days Journey which ran from
the anniversary of the stabbing on 17 June till the anniversary of David's death on 7 July.
This annual programme is organised by the David Idowu Foundation in remembrance of David and all victims of violent crime.
During the 20 days David's mother Grace gives talks in schools, prisons and other venues to promote peace over violence.
On Sunday 7 July a memorial service for David and other victims of youth violence was held at the nearby St George the Martyr Church.