"That's something we want to show, that there's not a whole lot of manufactured wood that goes in our buildings," Neren said.
But now, the center wants to build three more buildings and a community center for more classroom space, Neren said.
The wood that built the demonstration wall frame came from small Douglas fir trees hauled by horses from Aprovecho's land, Neren said.
Green building is becoming more common, Neren said.
The cabins use recycled newspaper for insulation, Neren said.