Invisible forces

Materials
clear tupperware
pen
string
paper clip
magnet

Results
Success

Working theory
Since magnetic fields can't be seen, if we tether a paper clip and put something between the paper clip and the magnet, the magnetic field should be more apparent.

Experiment
We tied a paper clip on a string and tied the other end to the middle of a pen. We put the pen across the top of a clear tupperware with the paper clip just touching the bottom of the tupperware. We moved a magnet around under the tupperware, dragging the paper clip around through the tupperware without it getting "stuck" to the magnet.