At the museum there was a range of activities, including tours and an art table where children designed masks of mythical characters.
Children's Day was also celebrated at Rainbow Springs. National organisations Footsteps and Fostering Kids, with local Foster Care Support Associations, sponsored a trip there for more than 200 children and carer families.
The event aimed to provide a memorable experience for the families and raise awareness of how the organisations can support them. Activities included a bird show, big splash rides, whanau portraits and a giant hand-painting.
Rainbow Springs part-sponsored the event as a way of giving back to the community.
Lynne Matthews, Central North Coordinator for Fostering Kids, said her organisation aimed to give children in foster care a stable, loving home by providing support and training to foster carers and their families.
"We are really excited to be working with Footsteps and Rainbow Springs to provide a fun day out that our families will remember forever."