I hope you can help me. Years ago I saw a science fair project that had a large powerful magnet. The magnet was held up about two feet over the surface. A piece of string was attached to the surface with an piece of iron tied to the other end. The magnet was powerful enough to pull the piece of iron straight up, the entire length of the string. There was a bout a foot gap between between the magnet and the piece of iron. It was really cool looking. Anyone know where I can find such a magnet? Thank you.
