How to make an Air Thermometer

Air Thermometer

 Requirements

 - A used electric bulb.

 - A one-holed rubber stopper with a 60cm glass tubing. The stopper must fit tightly into the neck of the bulb.

 - A candle.

 - A wooden stand.

 - A piece of paper.

 - A bottle of water.

 - A thermometer.

 - Tacks and adhesives.

 Procedure

How To make a Snake Windmill

 Snake Windmill

 Requirements

 - A piece of carboard.

 - Red colour paint.

 - A pair of scissors.

 - A cotton reel.

 - A pencil.

 - A cork.

 - A heater.

 Procedure

- Draw a spiral an the cardboard and colour it red.

 - Cut along the spiral and pull it out a little, so that it looks like a coiled snake.

 - Fix the tail of the snake to the cork and pin it to the lead of the sharpened pencil.

 - Attach the pencil to the cotton reel and hold it above a heater.

 Your windmill is ready....

How to make a Whirl Fan

Whirl Fan

Requirements

 - A thin circular tin disk.

 - A pair of scissors or cutters.

 - A knitting needle.

 - Pliers.

 - A cork.

 - A candle.

 - A matchbox.

Procedure

How to make a room heater at home

 Requirements

 - A tin can about 10cms in diameter and 13cms high.

 - About 30cms of nichrome wire.

 - A wooden base with two nails- A 9V battery.

 - Two short lengths of ceramic pipes.

 - Insulating wires.

 Procedure