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! Children are fascinated as they watch marbles roll toward and against each other. Great for use with magnetic wands. Perfect for science and engineering exploration and investigations! Each marble measure .63" diameter each. Includes 100 packaged in a clear bag with label.