Parents in Merthyr Tydfil are protesting over the local council's decision to introduce compulsory bus passes for school children. Instead of paying 60 pence per day, parents must now pay £39.50 per term.
Many parents say they cannot afford the payout and have no choice but to allow their children to walk to school.
In a statement, Merthyr Tydfil County Borough Council said the bus pass scheme implemented was "a way to improve the safety of pupils."
Previously, there was "no way of being able to clearly identify potential pupils, on any of our contracted buses, in the event of an incident", it said.