A set of magnetic lines of force 2D and 3D consists of

1. A tray containing iron filings in liquid, cuboid, about 7.2 cm in size, capable of displaying 3D magnetic lines of force.
2. A tray containing iron filings in liquid, rectangular shape, size approximately 15.5x9x1 cm. can display magnetic lines in 2D.
3. U-shaped magnets (U) color or identify north-south poles, clear, unbreakable.
4. Bar magnet, about 11 cm long, color or identify north-south poles, clear, unbreakable.