Put another piece of foil in the bottom of the pizza box, with the shiny side up. Cover the foil with the construction paper. This is the “heating element.”
Next, take the plastic wrap and stretch it over the open area (where the flap you cut used to be). Tape it well around the edges so that the wrap is sealed.
Put the food you want to cook on a small foil tray, on top of the black paper. Close the plastic lid, seal it is as tight as you can get it, with the box tabs tucked in. Use the stick to prop open the flap of your oven.
Check your food often by looking through the plastic wrap. Try not to open the lid too much because every time you do, heat escapes. When your food is done, open up the box and enjoy!