This week in science we were doing a lesson called 'Does It Change In Water?' We added flour, oil, sugar, salt, pasta, butter, ice . . . all sorts of things to water -- some cold, some warm -- to see if and how they changed.
The last part of the lesson was to add enough salt to warm water so that the water was cloudy, then to pour some on a saucer and let it sit in a warm place until the water evaporated. Of course, salt crystals formed, but I've never had such nice crystals form. Some were almost 1/4" square and about 1/16" thick. They were really neat to look at with the magnifying glass.
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