Have you tried 'Magnetic Earth; modelling the magnetic field of the Earth'.
This ELI involves finding out the location and magnetic field lines of a bar magnet hidden inside a sphere of PlasticineTM, as an analogy for the magnetic field of the Earth (but you don't mention the bar magnet when you use it!)
Teaching videos are also available.
Related activities can be found in our Magnetism category within Investigating the Earth.






