In the beaker, stir 1/2 cup of Epsom salts with 1/2 cup of very hot tap water for at least one minute. This creates a saturated solution, meaning no more salt can dissolve in the water. (Some undissolved crystals will be at the bottom of the glass.)
Add a couple drops of food coloring if you want your crystals to be colored.
Put the beaker in the refrigerator.
Check on it in a few hours to see a beaker full of Epsom salt crystals! Pour off the remaining solution to examine them.
