ironizer

but one of my teachers said she had a "magnetizer" and she would just put bars of iron in and make them magnets...

i have these magnet bars, but they are very weak. I want to magnetize them more, so they could be stronger, but i don't know how. I tried wrapping around a wire and connecting it to a current, but didn't work. I don't think i did it right. If anyone can help, that would be super!! Thanks in advance!