More than 350 youngsters took to two wheels to join a national sponsored bike ride in 2001.
The Blue Peter Bikeathon saw young cyclists and fans of the BBC TV show using pedal power to raise cash for the Leukaemia Research Fund.
Children rode along a three-mile circular course from The Cherwell School in Marston Ferry Road through north Oxford and Old Marston.
READ MORE: Waste woes during heatwave
Among them were Harry Humphreys, eight, left, and James Harris, nine, pictured above by Oxford Mail photographer Jon Lewis. Some children rode up to five laps of the marshalled course.
The national bike-ride was launched live on television by Blue Peter presenters Konnie Huq, Simon Thomas, Matt Baker and Liz Barker, and Match of the Day presenter Gary Lineker, a keen supporter of the charity.