Go Back

Fizzing Lava Rocks

Create colorful fizzing lava rocks that combine art and science, perfect for kids and adults alike. A hands-on activity to explore chemical reactions and engage in creative fun.
Prep Time 15 minutes
Total Time 1 day
Course Activity, Craft
Cuisine Creative, Educational
Servings 10 rocks

Ingredients
  

Main Ingredients

  • 1 cup Baking soda
  • 1/2 cup Citric acid
  • to taste Food coloring (various colors) Use different combinations for unique effects.
  • Water (for mixing and activating) Use gradually to control the fizz reaction.

Tools and Accessories

  • 1 Mixing bowl For combining ingredients.
  • 1 Silicone molds To shape the lava rocks.
  • 1 Glove (optional) For handling dye.

Instructions
 

Preparation

  • Clear a flat surface to work on and gather all materials in one area for easy access.

Mixing

  • In a mixing bowl, combine 1 cup of baking soda and 1/2 cup of citric acid. Mix well until evenly blended.
  • Add a few drops of food coloring to the dry mixture and mix until color is uniformly distributed.
  • Gradually add a small amount of water to the mixture while stirring continuously, ensuring it does not fizz yet. Stop when it holds together like damp sand.

Shaping

  • Pack the mixture tightly into the silicone molds, pressing firmly to retain shape.

Drying

  • Let the rocks dry for at least 24 hours in a cool, dry place, noticing them harden as they dry.

Testing

  • Once dry, remove the rocks from the molds and drop them into a bowl of water to watch them fizz and bubble!

Notes

Experiment with different molds for unique sizes and forms, mix in glitter for sparkle, or add essential oils for fragrance.
Keyword Crafting Project, Creative Fun, Fizzing Lava Rocks, Kids Activity, Science Experiment