These outstanding samples, available from various sites, were produced by students and teachers around the world.

This was created by kindergarten children in Turkey.

This, this, this, and this were created by elementary school children in Poland. 

This was created by a teacher in the United States.

This was created by a teacher in the United Kingdom.

This was created by a teacher in Venezuela. 

This was created by a teacher in Hong Kong.

This was created by Mark Shrosbree, a British teacher in Japan, and these by his students.