What is fat? Our classroom door, a school building and a pack of crisps.

What is thin? Your shadow hovering on a wall, the figure of a mannequin and a piece of hair.

What is old? Our school, our ancestors and the earth.

What is young? A newly-planted tree, a new-born baby and a brand new water bottle.

What is expensive? A designer watch, a Chanel perfume and a diamond ring.

What is cheap? A plastic bottle, a penny sweet and ready-made meals.