A SOLAR OVEN

YOU NEED:

A big pizza box, aluminium foil, plastic film, adhesive tape, glue, scissors, a ruler, a felt-tip pen, a rigid piece of black cardboard, food to be heated, a sunny day,

1. Draw a square on the top of the pizza box. Make sure you leave between six and seven centimeters from each side of the box. Cut out three of the four sides.

2. Glue aluminium foil to the inside of the window you have just made. Make sure to apply the glue on the duller side. Try to avoid creases in the aluminium foil.

3. Cover the inside of the pizza box with aluminium foil. Cut out a piece of black cardboard so that it fits perfectly inside the box and put the piece in the box.

4. Put the food you want to heat up on a piece of aluminium foil and place it inside the box. We put marshmallows on top of digestives biscuits.

5. Cover the hole in the lid of the box with plastic film. The sun must always be directed towards the aluminium lid for the food to cook well. Use the ruler to keep the lid in the right position. You may have to change the position of your oven depending on the angle of the sun.