It was supposed to have been a one-off event but Sunday will herald the fifth Rotorua Rigs and Rides charity show.
The event, at the Arawa Park Racecourse, is a chance for truck drivers to shine up their rigs and then give children - and sometimes their parents - a ride around the block.
This year, they are raising money for Plunket Rotorua.
"We first did it in 2011, it was supposed to be a one-off, fund raising for Christchurch after the earthquake," said co-organiser Geoff McCaull.
"But it proved so popular we've done it ever since. It's about kids and families. Kids love the trucks and the adults do, too. It's a good excuse for the Rotorua community to get together and have a big day out."