I think I got the idea at this exhibit at the Conservatory of Flowers in Golden Gate Park.
These are the famous Victorian Houses in San Francisco nick named "The Painted Ladies"
See Lombard Street?
This is the Mission Delores, one of the first missions in California and in the City itself,
This is the Gate to Chinatown in San Francisco.
All made out of recycled material.
Why? To heighten awareness of the use of old material. To repurpose it.
Especially in a way to make it appealing to children, and Mommies, and Nana's. I can vouch for that!