According to group founder Vanessa Stanley people were taking photos of their rock creations as well as sharing photos of their findings on the page.
The idea, she said, is to paint and hide rocks, find others and then ideally re-hide the works of art.
There are three rules though.
Group members are advised not to have anything stuck on the rocks that could become litter.
Also, if contributors use acrylic poster paint, they are asked to use a sealer on top to ensure the paint does not run when it gets wet.
"Clear nail polish, spray-on sealant or polyurethane can be bought at hardware stores, Super Cheap Auto or The Warehouse, and you can use coloured nail polish to paint with or an exterior paint, which would not need sealing," said Vanessa, of Paraparaumu.
Lastly, rocks need to be hidden in locations that will not affect council mowers or destroy gardens because, according to the mother of one, "we don't want to cause problems - we just want to spread the joy".
While the Kapiti group stemmed from similar initiatives in Fielding and Palmerston North, where it first started nationally, the concept is not unique to New Zealand. The first group of its kind was the Port Angel Rocks located in Washington, United States.
"I wanted to create a Kapiti group because it's a great community project and will help to get families out and about in the fresh air, at little to no cost.
"From what I have seen, people love it when someone else finds their rock and it gets posted back to the Kapiti Rocks page."
Local business Howell Hair Creations had fuelled the hobby by creating and hiding a rockwhose lucky finder will receive a free $55 pamper.
Vanessa said as the New Year rolled in and the sunny weather drew more outdoors crowds, Kapiti Rocks had become increasingly popular.
"In the last two weeks the group has almost tripled and it just keeps going."
