Crossword puzzle clue "kind of building set"

Kind of building set

Basic building block of basic building blocks

Building block of a building block

___ Building, company headquarters erected in 1908 in New York City, at the time the tallest building in the world

Part of a kid's building set

Building material that has to set

Building unit / Set-off chunks of text

1988 movie set in the Nakatomi Plaza building