Against gravity:
http://buggyandbuddy.com/gravity/

How to make a compass:
http://kidsactivitiesblog.com/12007/how-to-make-a-compass

Painting with magnets:
http://leftbraincraftbrain.com/2015/03/29/five-minute-craft-magnet-painting/

Magnet car:

https://es.pinterest.com/pin/321374123388991019/

Magnetic minerals:
http://lifestyle.howstuffworks.com/crafts/other-arts-crafts/science-projects-for-kids-magnets-and-metal2.htm

Magnetic boat:

Magic needles:

Magic coins: