* A book: Most books are heavier than a pencil.

* A cat: Even a small cat is heavier than a pencil.

* A chair: Chairs are made of wood or metal, which are denser than pencil lead.

* A human: Humans are much larger and heavier than pencils.

* A car: Cars are incredibly heavy compared to pencils.

* A planet: Planets have a huge amount of mass.

Let me know if you'd like more examples!