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which creates a cleaner line, and also reduces the risk of injury. When I was in art school, a two foot metal straight edge ruler was a required item on our supply list.

Then glue the aluminum foil to the inside of both the large and small box. Place some more foil on the inner edge of what remains of the flaps of the outer box. Glue down the flaps of the outer box. Wad up some newspaper and place it on the bottom of the large box. Adjust the newspaper so that the top of the smaller box is perfectly in line with the top of the larger box. Glue the flaps of the small box to the flaps of the large box, and trim the excess with a box knife.

Cut out another piece of cardboard the size of the inside bottom of the inner box. Glue aluminum foil to one side of the cardboard. Paint the foil black and allow to dry. This will form a "drip pan" which you can place in the bottom of the solar oven when it is used for cooking.

To build the removable lid, place the large sheet of cardboard on top of the solar oven. Trace the outline of the solar oven from underneath. Fold over the excess cardboard (which should be about two or three inches wide) so that it forms a lip around the solar oven. Make sure that the corrugations in the cardboard go from left to right rather than up and down. We missed this step somehow when we were assembling our solar oven, and as a result we couldn't prop the lid open properly. So be sure you get it oriented properly so you don't have the same problem.

Draw a line around the lid which is the same size as the solar oven opening. Cut this out on three sides only, so that the flap can open upward. Place some more foil on the inside of this flap.

Bend a twelve inch segment of wire hanger, and then place this inside the corrugations of the cardboard on one side to prop the lid open.

Turn the lid upside down and glue the oven bag to the underside. There is no need to open the bag; just glue it on whole.

Be sure to glue the oven bag closed on its open bag. This way the air inside the bag will expand, helping to increase the heat in the solar oven during cooking. It will also prevent condensation from collecting inside the bag.

Your solar oven is complete, but in order for the science project to be complete, we have to cook something. We chose oatmeal cookies for our science fair project. Solar oven recipes should preferably be free from eggs, dairy, and other animal products, at least at first,since we can't guarantee that the temperature inside the oven will

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