Mr Sherburn said that unlike fishing in lakes or rivers, fishing at the hatchery meant kids were guaranteed to catch a fish. They could take their catch home to eat too, he said.
All fishing equipment will be provided and instructors from the Rotorua Anglers Association will be there to teach the children how to cast their rods and hook fish.
The event has been running for years and Mr Sherburn said it always proved successful, sometimes with more than 500 children taking part.
"The children always seem to enjoy themselves. They leave with a great big grin on their face."
Mr Sherburn said the day was about encouraging children to try fishing and get them outdoors in the fresh air.
"I think more and more kids stay indoors, doing anything that involves a flat screen, but fishing is something that can get them outdoors and doing something that their parents, or grandparents may have done when they were children."
Children can get a certificate recording the weight of their fish before they leave.
Parents and caregivers who are planning to bring their children to the day must pre-book by calling the Fish & Game office on (07) 357 5501.
The Kids Fish Out Day is sponsored by Rainbow Springs.
Details
What: kids fish out day.
Where: fish & game's ngongotaha trout hatchery, rotorua.
When: sunday from 9am to 12pm and 1pm to 3pm.
Cost: $3.
