Cook Food Using the Sun Step by step
Here's the Materials You'll Need:
Empty pizza boxAluminum foil
Plastic wrap
Tape
Pen or pencil
Scissors or utility knife
Ruler
Paper plate
Chocolate or marshmallows
Graham crackers
Thermometer (optional)
Safety note: The solar oven can get very hot. Use caution when handling.
Step 2 of 8:
Draw a square around the lid of the pizza box about 2 inches away
from the sides. Cut along three of the lines -- on the sides and front
edge of the box -- leaving the fourth line along the box's back hinge
uncut.Step 3 of 8:
Fold back the square flap. Cut a piece of foil to completely
cover the flap. Tape it to the part of the flap that faces downward into
the box, shiny side out. Make sure you press all the wrinkles out.Step 4 of 8:
Cut enough foil to cover all inside surfaces of the pizza box,
both the bottom and the sides. Place the foil shiny side facing out and
overlap the seams. Tape into place.Step 5 of 8:
Cut a piece of plastic wrap to cover the hole that the flap made
in the box lid. Hint: Before cutting the plastic wrap, tape one end of
it to the box lid and stretch it across so it covers the hole. Tape the
plastic to the pizza box lid, sealing it tightly so no air can get out.
Cut the wrap and finish taping it down.Step 6 of 8:
Place graham crackers and chocolate (or marshmallows) on top of
the paper plate and place inside the cooker. You can try making
different kinds of food, like a grilled cheese sandwich.Step 7 of 8:
Close the lid of the pizza box. Fold back the flap and prop it
open with a ruler or stick. Place the box outside, with the flap facing
the sun. The sun should reflect off the flap and into the box. Let the
food cook until it's done, which may take 30 minutes to an hour. If
you'd lke, you can place a thermometer inside the box and measure the
temperature every 10 minutes to see how hot it gets. Enjoy your snack
when it's ready!
Safety note: The solar oven can get very hot. Use caution when handling.
Step 8 of 8:
The solar oven has a reflector that takes the light energy from
the sun and concentrates it towards the baking chamber. The sun's rays
are collected by the aluminum foil flap and concentrated on a single
point inside the box. The rays are converted into heat energy. When an
object such as chocolate or a hot dog is placed inside the box, it heats
up and cooks.
This solar oven lets you cook anything that can be prepared in a conventional oven or stovetop. It can reach temperatures of 275 degrees - hot enough to cook food and kill germs in water. A general rule for cooking in a solar oven is to get the food in early and don't worry about overcooking. Expect cooking time to take about twice as long as conventional methods, and allow about half an hour for the solar oven to preheat.
Insert a 15-cm PVC pipe into the middle hole of a PVC T-joint.
Repeat with another 15-cm PVC pipe and T-joint. Join the two pieces
together by inserting the free ends of the pipes into the sides of a
third T-joint, with the middle hole facing up.
Insert the remaining PVC pipe into the T-joint hole that is
facing up, so that the pipe stands upright. Place the final T-joint on
the free end of the tower.
Attach two wires to the motor. Place the motor securely into the
joint at the top of the tower. Run the wires down the tower pipe and out
one of the T-joints on the base. If needed, use duct tape to keep the
motor in place securely.
Connect the wires to the multimeter using the alligator clips. Set the multimeter to 20 volts.
Place a few small, wooden dowels into the holes of the hub.
Create wind using a hair dryer or fan. Check the multimeter to see how
much energy is generated.
As the kinetic mechanical energy of the moving wind moves and
rotates the blades of the wind turbine, a generator inside the turbine
is also rotated. This causes a coiled wire to rotate around a magnet and
creates an electrical current which we measure with a multimeter.
Use the funnel to pour 2 teaspoons of baking soda into an empty balloon. Rinse and dry the funnel.
Use the funnel to pour ¼ cup of vinegar into the bottle.
Stretch the mouth of the balloon around the bottle top.
Lift the balloon, letting the baking soda pour into the bottle. Watch what happens!
When you combined the solid (baking soda) and the liquid
(vinegar), the chemical reaction created a gas called carbon dioxide.
Carbon dioxide is invisible, except as the bubbles of gas you may have
noticed when the vinegar and baking soda mixture began to fizz. This gas
is what made the balloon inflate.
An adult should complete steps 2 through 4 without letting the children see.
Dampen an M&M and make a smudge on a coffee filter strip about a
third of the way up. This is the candy evidence that was found at the
crime scene. 
The children can complete the following steps. Write “A” at the top of one of the unused filter papers and “B” at the top of another unused filter paper.
The dyes used to make colored candy can be made up of several
colors. These dyes are composed of different compounds that separate
during chromatography. The water rising up the filter paper caused the
compounds in the candy to spread out in a spectrum. 
