Cutting down the number of cars on the school run is the aim of a new "cycle train" set up by a school in south Wales.
Children have to have training before they are allowed on the train
The scheme, at Evenlode School in Penarth, also encourages pupils to exercise and learn about road safety.
The "train", thought to be the first of its kind in Wales, sees cyclists escorted to school by adults.
It follows the introduction of "walking buses" at a number of schools around the UK.
Organiser Mike Dacey, senior road safety officer for the Vale of Glamorgan, explained how it works.
"We have one driver at the front, we have a guard at the back and another adult to accompany them," he said.
He said around 10 children took part on Friday, and had enjoyed it.
"It is popular - we have got to fight them off - they all wanted to join in," he said.
"It is never a problem with children, they would much prefer to cycle than walk."
He said that health of the pupils was one of the main reasons for starting up the scheme, as well as tackling congestion.
"One is to cut down traffic from the school traffic - the traffic congestion in the mornings is horrific," he said.
Mr Dacey has called for parents to volunteer to help run the project, and keep it going.
"We can start it and show people how to do it, but we do need volunteers to maintain it - it has to be sustainable by the school and parents."
He added the train, which already operates in Oxfordshire, could be introduced across Wales.
"There is no shortage of children to cycle, they just want a safe route to school," he said.
Children involved in the train have to have intensive rider training before they are allowed to join.