Take a plastic or a paper cup (non-magnetic material) and fix it on a stand with the help of a clamp. Then, place a magnet inside the cup and cover it with a paper (which is again a non-magnetic substance) so that the magnet is not visible. Now, attach one end of a thread to an iron clip and tie its other end to the base of the stand. After this, when you bring the clip near the base of the cup, you will observe the clip rising in the air without any support, just like a kite. This proves that magnetic effects can pass through non-magnetic materials.