Magnet Probe, Consists of a small 19 mm length alnico bar magnet mounted in freely rotating gimbal, rotates in 3D so that all x, y and z co-ordinates, three-dimensional magnetic force fields, can be mapped, Strong plastic construction
Magnetic Earth Field Model, Use it as is or place it on an overhead projector to show the whole class, Iron filings are suspended in oil to allow the included magnet to align them to its field