The magnetic shapes they each had.
First up is one of my two favorites, Magnetic Force
Next favorite is Attract
Now for the two that wouldn't cooperate! First is Polar Opposite
And lastly, Magnetized
Overall, I'm happy with this purchase. I'm hoping for the 2 that wouldn't work good will work better with other magnets, if not, atleast the color by itself is pretty :D. Hope ya'll enjoyed :).