If All The World Were Paper is a very short but fun nursery rhyme. The kids actually love the idea about thinking all the world is paper! Why not ask them what they think the houses and the people and the stores and the cars +++) would look like in a such world? Planes are easy, right!? :)
If all the world were paper,
And all the sea were ink,
If all the trees Were bread and cheese,
What should we have to drink?