Science Projects And Inventions

YOU  NEED:

• Two glass jars
• Some hot water and some cool water
• A pencil
• Some thread

Take half a jar of hot water and dissolve as much alum as possible in the water. Cool the solution and pour it into another jar. Tie a small length of thread on a pencil. Suspend the thread from the mouth of the jar so that the thread touches the surface of the solution. You will find that a crystal will start forming on the end of the thread. If you leave it for a few days you will find that it will grow in size.