How do you make a magnet without any magnetic materials? Give an example?
Use electric materials instead. Wrap a long wire around a demagnetised iron bar a few times (if it's a very small bar, fifty times might be enough). Arrange the wire in a spiral shape around the bar - it mustn't pass over itself . Use thin wire to get as many loops as possible, but obviously use insulated wire or you'll electrocute someone. Then run a direct electric current (such as you might get from a battery) through that wire. Eventually, you should find that the bar is magnetised. I haven't actually tried this though, so I don't know if it works. But it should. If it's too hard, you can find magnetic rocks naturally. Sometimes they've been hit by lightning, or they've been magnetised by the Earth's magnetic field. But those tend to be fairly weak magnets.
