Making of solar heater / cooker :
1) Make a wooden / iron frame in the shape of TV dish.
2) Cut the acrylic mirror sheets into 8 or 12 pieces in the shape of isosceles triangle with a height equal to the radius of you dish antenna.
3) The bases of 8 or 12 triangles together make the circumference of the dish.
4) Stick the triangle mirrors to the dish.
5) Face the dish towards the sun. Find the focal point and place a vessel at that point.
6) It will get heated. Even you can cook rice in that vessel.
7) In this way we will make a solar heater / cooker.