What are heavy? The Titanic sinking into the storm, a flying car from Switzerland and an Irish leprechaun at the end of the rainbow with a pot of gold.

What are light? A peacock’s feather falling in the sunset, a bug crawling in its habitat and a mouse when criticising your house.

What are rough? A rock from the Great Pyramid, a metal pole bent six times and rocky bones from a giant’s body.

What are smooth? A pen lid made in England, a pointy piece of flint from the Stone Age and a beach ball that hasn’t been popped.