[Eddie]

Dublin Bus continues to charge 77c schoolchild fare on Saturdays, as long as you use the validator on the right of the entrance door, and not the drivers machine, which will charge 90c / €1.10, depending on the destination.

So in fact there's an anomaly here:
If an adult uses the automatic validator they will be charged a maximum fare for the journey so must go to driver for a lower fare for a shorter distance.

If a child uses the automatic validator Mon to Fri before 7pm / Sat before 1.30pm they will be charged the lowest fare by using the validator, and be charged more for using the driver's machine.

I bet not many people know that!

The discount of 75c for a child for each subsequent bus journey made within 90 minutes of the previous validation also means that after the first journey, subsequent fares can be 77c-75c=2c, a bus fare probably not seen for about 50 years!