What is it made of?

• book - are - paper

• paper - is - book

• book - is - paper

• bottle - is - glass

• glass - is - bottle

• bottle - are - glass

• cardboard - is - box

• box - are - cardboard

• box - is - cardboard

• bucket - is - plastic

• bucket - are - plastic

• plastic - is - bucket

• chairs - is - wood

• wood - is - chairs

• chairs - are - wood

• metal - is -fork

• fork - is - metal

• fork - are - metal