Green building project question?

Question

i have a school project, and i have to build a scale model green (energy saving) house. some how i have to make the inside colder than out side. any suggestions on how i should make the house? or how to make it colder?

p.s. i already had the idea of putting ice inside to make it colder. but it would melt.

Answer 1

Solar cells to a thermoelectric cooler.  I just hope you have the budget.

You might go with a solar powered mini swap cooler.

As for building the house, check out Hobby Lobby.  They have the parts for scale doll houses.