Even the busiest children can get bored during summer vacation. If you are looking for a fun project to do with them, consider making geodes in assorted colors. Geodes form in gas bubbles within igneous rocks. Crystals develop in the middle of these spherical stones. The colors on the interior are created by different minerals inside the rock. A geode is a mystery because you cannot identify the colors inside of it until you break it open.
You will need:
Step 1: This project requires only the shells of the eggs. Crack eggs by hand or use a knife to cut a straight line in the middle. Remove the contents and wash the two halves of the shell from each egg. Take care not to crack the bottom of the shell. Set the eggshells aside so they can dry.
Step 2: Pour the warm water into the glass.
Step 3: Spoon the Epsom salts into the glass, mixing during the process. Mix until no more of the salt is able to dissolve.
Step 4: Add different colors of food coloring, using your creativity to create different hues.
Step 5: Fill each eggshell with the Epsom salt solution.
Step 6: Place the eggshells in a cool, dry spot. The water will need to evaporate and the Epsom salts must crystallize, which can take several days.
Step 7: Once the water has completely evaporated, you will see a colorful and amazing geode. The eggshell acts as the rock surrounding the geode cavity. As the water evaporates, the salt minerals crystallize inside the eggshells. The food coloring imitates colors that form inside geodes due to the mineral deposits they contain.