"It's here just to tell people that there's a lot that's going to be happening at Castlepoint," he says.
As well as the model lighthouse, a competition for kids to make a model, draw a picture or create a collage of the lighthouse closed yesterday.
Mr Keen said he was "very impressed" with the entries received, and the winning entries will be displayed as part of the celebrations.
"There's a huge amount of effort gone into those," he says.
Mr Keen said the centennial celebrations will have something for all age groups, including a free concert featuring local bands such as Skaper and Mr Groove, and kite flying and sandcastle competitions.
The Castlepoint lighthouse 100-year celebration is on from February 15 to 17. The all-day free concert will be held at the Wairarapa Fishing Club grounds on February 17. See www.lighthousecentennial.castlepoint.co.nz for more information.