Using a few ingredients from around the house you can turn an ordinary egg into a geode. A geode is found in nature when a hollow space inside a rock forms crystals along the inside wall of the space. Make sure an adult is present to supervise.
n 12 eggs
n Food coloring
n STEP 1: Crack each egg near the narrow end. Remove the shell near the top of each egg and then pour the contents into the trash or have an adult save them for a cooking project later.
n STEP 2: Using warm water, clean the inside of each egg.
n STEP 3: Place the eggs into the egg carton and let dry.
n STEP 4: Add two cups of water into a saucepan on a stove, and add food coloring. Mix while the saucepan is heated on high.
n STEP 5: Continue to add borax to the saucepan until the water is super saturated.
n STEP 6: Once the water starts boiling, carefully pour the solution into each egg and allow the water to evaporate.
As the water evaporates from the eggs, borax crystals and the food coloring are left from the mixture and deposit on the sides of the egg creating a geode egg.
You can discover more hands-on experiments by going to hookedonscience.org.