I give full credit for this experiment to Home Science Tools. Click their link to see the science behind the experiment, and for more crystal-growing ideas.
For this experiment we needed:
· 1/2 cup Epsom salts
· Food coloring
· 1/2 cup hot tap water
· A refrigerator
Mix the Epsom salts with hot tap water and color the water any color you want. Then refrigerate them and see what happens after a few hours. We made ours in the morning and took these pictures at dinner-time.
With my son's recent obsession with Superdog, I'm going to revisit this experiment and make red and green kryptonite with him. You could make a whole crystal garden if you wanted to!