After five weeks of hard work, 50 Warrington School pupils completed an ''eco-village'' model on a school lawn last week, which they say is a showcase of good ideas and ''sustainable planning''.
School principal Nathan Parker said the project aimed at getting pupils thinking about town-planning and architecture which did not adversely affect the environment.
Mr Parker said the pupils ''got right into the project'' and would often complete construction work during intervals and after school.
Pupils Aimee-Leigh Rainbow and brother Steven stayed until 7pm one day because they were determined to finish an elaborate eco-sanctuary structure made from interwoven yarn.
Steven said he enjoyed building canals, which bordered the town, and constructing roadways, but some of the town's planning was ''quite difficult''.
Mr Parker said pupils even grappled with ''urban sprawl'' and found they were running out of space and resources for more adventurous projects. They had to prepare more land for the miniature eco-houses.