A Doll's House

This question applies to "The Doll's House" by Katherine Mansfield. Kezia's favorite item in the doll's houds is the lamp.

But what Kezia liked more than anything, what she liked frightfully, was the lamp. It stood in the middle of the dining-room table, an exquisite little amber lamp with a white globe. It was even filled all ready for lighting, though, of course, you couldn't light it. But there was something inside that looked like oil, and that moved when you shook it.