Try growing crystals

Learning to grow crystals is a fun, educational, science project. See how molecules combine and layer together. You can create some very beautiful miniature gardens, tiny trees and even colorful night lights. Crystal growing projects can be created with materials from home, from a store, or online. When you dissolve chemicals in water or combine and melt certain solids, crystals grow as the materials cool. There are material lists and instructions available online or if you really want to simplify things, you can purchase kits at larger box stores, on-line, or hobby stores.
A crystal is a solid material with atoms and molecules that are arranged in a consistent repeating pattern, creating one of seven geometrical shapes. Crystals can be expensive and beautiful, like amethysts or diamonds, but they can also be found right in your kitchen in the form of sugar and salt! You can easily grow crystals by adding a crystal-forming chemical to water and waiting for the water to cool or evaporate.