What's these windows made of?
glass
What's this church made of?
stones
What's this vase made of?
ceramic
What's this made of?
wood
What's the Eiffel tower made of?
iron
What are these made of?
stainless steel
What's this made of?
wood
What's this made of?
ceramic
What are these cans made of?
aluminium
A mixture of sand, cement and water.
concrete
What is this pipe made of?
plastic
