Firefighters in Leicestershire will be using pedal power to help reduce the number of summer grass fires.
During the school holidays, two firefighters will tour parks to deter youngsters from starting fires.
A fire service spokesman said that there were 333 deliberate grassland fires between June and August 2006.
He added the idea of the new scheme was not just to cut the number of fires but also to provide activities for young people during the school holidays.
"We know that boredom and peer pressure are motives that lie behind many of these fires and by positively engaging the young people in healthy alternatives, we hope to benefit them whilst driving down the number of deliberate grassland fires," said arson task force manager, Paul Dickens.
"We hope to encourage young people to resist any anti-social fire setting temptation and control their behaviour for the good of themselves and their community."
The firefighters will be out and about over the summer between 1400 BST and 2000 BST every day on bright red mountain bikes.