<span>Coosje van Bruggen is the person who collaborated with claes oldenburg to create the sculpture plantoir. She worked in partnership with Coosje van Bruggen.</span>
It is called a palette, it can come in different forms and hold different types of paint
There are multiple answers that you could argue, but my best guess is that in these years he was influenced by jazz, the "music on the street", since this is when he wrote music for the Theatre suite.
