With the warmer weather kicking in, children can don their thinking hats and take on a challenge with a scavenger hunt.
Ben Holt, education officer at ErinEarth, said their scavenger hunt is famous, and every fun day they host children are asking if it is on.
"Because it is so popular we decided to centre a whole day around it," he said.
"We have three different levels, an infants level, a medium level and a hard day.
"It looks like it's going to be a big day."
Mr Holt said last time they had an open day, about 350 people came which is double their usual number. He predicts similar numbers for this weekend.
"The infants one is not too hard, it is set up for parents to do with their kids," he said.
"The medium one is for ages five to 10, and that's going to be a bit about patience, so kids doing that need to be prepared to exercise a bit of patience."
The final one is for the "seasoned campaigners", Mr Holt said, so the ones who are always wanting to know when the next scavenger hunt is on.
"The hint I would give is to give yourself 30 minutes, and you will need to look at the types of seeds and shapes of tree leaves," he said.
"We will also have experts on hand to help with general gardening tips such as when to put your veggies in, which plants suit our local area, how to look after plants in your backyard and how to help your garden survive the summer."
The fun day is not just for children who are keen to go hunting, with a new nature playground ready to inspire outdoor play.
"We have a lot of preschool groups come through, and they love getting down and dirty and climbing on things," he said.
"So we have taken that and made a specific nature play area with logs to balance on, water to play with and spots to dig, and it is all shaded.
"You can dig, make and plant."
Mr Holt said come on down and enjoy the sunshine.
The family fun day and scavenger hunt is on this Saturday from 9:30am to 1pm at ErinEarth. The cost is a gold coin donation.