What is a chair made of?
A chair is made of wood.
What is a book made of?
A book is made of paper.
What is this castle made of?
This castle is made of sand.
What is this bench made of?
This bench is made of stone.
What is a pen made of?
A pen is made of plastic.
What is an eraser made of?
An eraser is made of rubber.
What is a spoon made of?
A spoon is made of metal.
What is a window made of?
A window is made of glass.
What is this ring made of?
This ring is made of gold.