Definition of wooden (adjective)
expressionless; dull; inflexible; stiff; blunt
This week's theme is wooden. Take this grand estate. This is just one of the houses you find in my neighborhood. What keeps this from being dull is the wood fence on lower left side of the picture. The house per se is not dull, but if it's all you see, estate after estate, they get pretty dull. So, this nice touch of a fence keeps this place from being 'wooden'