"Everything is coming into place for it to be a great day. There will be activities and entertainment for everyone."
The McGarvie family is putting the finishing touches to a trolley they bought especially for the event.
"My whole family is going to be involved," she said.
"Our cart is cool, like a hot rod. It's a bit heavy so we have to do some final modifications. We really enjoy the derby atmosphere. Everyone is there for a good time. The races are cool to watch but even off the race track there are happy faces everywhere. It's like an old-fashioned fair."
All money raised from the event is going to the Kaharoa School PTA, which wants to fund teacher aides at the school.
There are three age categories for drivers aged between 5 and 10, 11 and 17 and over 18.
The races will be on Kaharoa Rd, which will be closed from 7.30am to 3pm.
Details
What: Kaharoa School Trolley Derby.
When: Sunday, March 22, racing starts 9am.
Where: Kaharoa Rd.
How much: Free.