today i will show you how to make a compass in 5 min.it is easy ,cheap to build.so lets get started.
these are the things that you may need:
2)floatable plastic or even sponge.
4)permanent marker or correction pen
firstly take a needle and rub one of its end to one pole of the magnet 100times.it may take one minute.then rub the other end of the needle with another pole of magnet.
now take the plastic and make a circle.now stick the needle in middle of it.
now drop it on the water.it will start to move and at a time it will stop moving.now if you move it the other side, it would get back to that early spot.now mark its two ends north and south by matching the direction with another compass.
now with a marker write the other directions,east and south.now your compass is ready.you may see the direction any time by just dropping it on water.
warning :dont keep it near other magnets or it will not give right directions.
i am argha halder from naogaon bangladesh.iread in class six in biam laboratory school.