Fizzy Rainbow Rocks Experiment

A delightful project that combines art, science, and a dash of childhood wonder. Create colorful rocks that fizz when they meet vinegar, perfect for a cozy afternoon with your kids or a fun gathering with friends.

Print Recipe Pin Recipe

Prep Time 10

Total Time 1

Course: DIY, Experiment

Ingredients Equipment Method Notes

Ingredients

For the Fizzy Rainbow Rocks

1 cup baking soda This is the key ingredient that makes the fizz happen!
1/2 cup cornstarch Helps bind the mixture together.
1/2 cup white vinegar The magical liquid that will create the bubbling reaction.
1/2 cup water To mix with the food coloring.

Food coloring

Plastic or silicone molds
Baking sheet
Tray or container for the experiment

Equipment

Mixing bowl
Plastic or Silicone Molds
baking sheet
Tray or Container

Method

Step 1: In a mixing bowl, combine 1 cup of baking soda and 1/2 cup of cornstarch. Feel the fine texture of the powders as you mix them together.
Step 2: In a separate bowl, mix 1/2 cup of water with a few drops of food coloring. Stir gently and watch the colors swirl together.
Step 3: Gradually add the colored water to the baking soda and cornstarch mixture. Stir continuously until you achieve a thick paste.
Step 4: Pack the colored paste tightly into your molds. Press down firmly to ensure they hold their shape.
Step 5: Place the filled molds on a baking sheet and let them dry for 24 hours.
Step 6: Once dry, carefully remove the rainbow rocks from the molds.
Step 7: To conduct the experiment, place the rainbow rocks on a tray or in a container. Pour 1/2 cup of white vinegar over them and watch the fizzing reaction!

Notes

Store the fizzy rainbow rocks in a cool, dry place away from moisture. If you want to reuse them, allow them to dry out completely after the experiment.