Dowling Magnets North/South Magnet Marbles (Red/Blue), Set of 100

Dowling Magnets North/South Magnet Marbles (Red/Blue), Set of 100 | Color-coded magnet marbles (poles: red north and blue south) make it easy to see how magnetic attraction and repulsion cause motion! Perfect for science and engineering exploration and investigations! Marbles measure 0.63″ diameter each. Includes 100 packaged in a clear bag with label.