Lets say for a moment you and your kids decide to do a science experiment. You want to grow crystals. Great! There are lots of resources out there that tell you how to do all sorts of crystals. One of which is salt. Ordinary Table Salt.
So you and your family set out to grow beautiful cubic crystals. You heat up some water, and dump tons of salt in the water until nothing will dissolve anymore. You pour your supersaturated solution of good old sodium chloride into a cup, and dangle a string in the cup. You wait..... and wait... and wait. A week passes, and you have nothing to show for it at all. The sugar crystals came out great, but sugar is so pedestrian. The cubic salt crystals would have been so much better, but it's a total no-go. What happened?
The next stage will be to take an ideal specimen from the crystals formed by the solution and attach it to some nylon fishing line to use as a seed for the final large crystal. Stay tuned!