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A Magnatized Needle
During the 11th century people in China
made a compass by using wax,small iron neddle,and
a strand of silk.
They rubbed the needle with lodstone. This
permanently magnetized the needle. They discoverd the needle points north and south.
http://youtu.be/AMXo1iZHYz0
There are 6 diffrent steps
First, you put cooking oil into an ice cream cap. Second,put half a spoonful of iron and stir with penicl. Third, put a bar magnet under the lid then see the iron move. Then reapet steps1 and 2. Fifth, put 2 square magnets on the side. Finally, Put oil and iron again and put a flexible magnet under and see what happens.
Rare earth magnets are made of rare meatls. Two examples are neodymium and samarium. Rare earth magnets are EXTREMALY powerful. If you straped large ones to your hands and feet you can climb a steel wall.