It can take centuries for rocks and crystals to form in nature. Demonstrate one way that rock crystals take shape, in just a few days.

Follow the steps below to learn how to do this experiment on your own.

What you'll need: • Epsom salt • a tablespoon • a cup of water • a paper circle • a jar lid

Now Do It! 1. Cut out a paper circle the same size as the jar lid. Put the circle in the lid. 2. Measure 4 big tablespoons of Epsom salt. Don't worry if you add too much - the more, the better. 3. Dissolve all 4 tablespoons in the water and stir the mixture thoroughly. 4. Pour the water mixture into the jar lid. Stick the lid in a place where it won't be disturbed. It will take a few days, but let the water evaporate and see what happens!

In a few days, the water will evaporate from the lid. But the Epsom salt will be left behind. The salt will build up into its own unique crystal shape. You can make a miniature rock forest. But don't just sit there... Get to it!