The chapter I reference has to do with putting stars up in the sky. Here's a paragraph from the book:
"Then Jane and Michael saw a most amazing sight. As soon as she arrived at the top of her ladder, Mrs. Corry dipped her brush into the glue and began slapping the sticky substance against the sky. And Mary Poppins, when this had been done, took something shiny from her basket and fixed it to the glue. When she took her hand away they saw that she was sticking the Gingerbread Stars to the sky. As each one was placed in position it began to twinkle furiously, sending out rays of sparkling golden light."