A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

Iron is also in a mineral called loadstone which is the most magnetic naturally-occurring mineral. Trace or draw the little skater shown in the drawing, or use the drawing in the PDF. Bend the feet so ...

[Nick]’s zen rock garden uses a magnet to draw a ball bearing across the sand in interesting patterns. The build uses 3D printed gears and laser cut parts to rotate the table around and move the ...