What does the term "ticky-tacky" in the song "Little Boxes" mean and what is its etymology? [closed]

The song "Little Boxes" by Malvina Reynolds has these lyrics:

Little boxes on the hillside
Little boxes made of ticky-tacky
Little boxes on the hillside
Little boxes all the same
There's a pink one and a green one
And a blue one and a yellow one
And they're all made out of ticky-tacky
And they all look just the same

What does the term "ticky-tacky" mean and what is it's etymology? Is "ticky-tacky" some sort of building material?

OED has this song as its first recorded use of ticky-tacky.

Originally U.S.
Inferior or cheap material, esp. that used in uniform suburban building.

1962 M. Reynolds Little Boxes (1964) (song) 3 And they're all made out of ticky tacky, And they all look just the same.

They suggest that it's derived from a reduplication of tacky,

Dowdy, shabby; in poor taste, cheap, vulgar. Also in combinations, as tacky-looking adj. colloquial (originally and chiefly U.S.).