hello, in science class we did a building challenge and we had to build a solar oven to cook a marshmallow . Our team's plan was have a box and put mirrors on ether side to reflect the sun to the marshmallow and the marshmallow was on an egg cup. Then we put tinfoil on the bottom and the side to help reflect the sun. Then we had a magnifying glass and put it over the marshmallow and the sun went through the magnifying glass and on to the marshmallow and we burnt the marshmallow. Our team won 1st place because we burnt the marshmallow first.