Evidence-based curriculum for ages 2-8

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Fun St. Patrick’s Day Activity for Kids: Magical Leprechaun Rocks


Celebrate St. Patrick’s Day with an engaging activity that kids will love! These Magical Leprechaun Rocks are simple to make and offer an exciting surprise as they fizz and dissolve, revealing hidden treasures inside. This activity blends creativity with a bit of science for a memorable St. Patrick’s Day experience. Watch the full tutorial on the ABCmouse Instagram page here.

What You’ll Need for your Magic Leprechaun Rocks

  • A clear glass cup
  • A bowl for mixing
  • Baking soda
  • Water
  • Green food coloring
  • White vinegar
  • Gold leprechaun coins
  • Gloves (Optional)

Instructions for Making Leprechaun Rocks

Step 1: Gather Your Supplies

Set up the materials from the list above in a clean workspace. If desired, use plastic gloves to keep hands clean while creating the rocks.

Step 2: Measure Baking Soda

Pour 1 cup of baking soda into a shallow mixing bowl. This will form the base of your leprechaun rocks.

Step 3: Add Water

Slowly add 1/4 cup of water to the baking soda. This will help bind the mixture so it can be molded into a rock shape.

Step 4: Add Dye

Add a few drops of green food coloring to the mixture. Adjust the amount based on how vibrant you want the green to look.

Step 5: Stir Mixture

Mix the baking soda, water, and food coloring thoroughly until it forms a wet, crumbly texture. Make sure the color is evenly distributed.

Step 6: Start Molding Mixture

Scoop some of the mixture into your hands and begin shaping it. Wear gloves to ensure the green food coloring doesn’t rub off onto your hands. The texture should hold together like damp sand.

Step 7: Place a Coin Inside

Press a gold leprechaun coin into the center of the mixture. Cover the coin completely as you mold the baking soda mixture around it.

Step 8: Shape the Mixture Into a Rock

Shape the mixture into a rock form, ensuring the coin is hidden inside. Repeat the process for as many rocks as you’d like to make.

Step 9: Let Them Dry

Place the shaped leprechaun rocks on a flat surface and allow them to dry for several days. This helps them harden, making them easier to handle.

Step 10: Pour Vinegar in a Cup

Pour about an inch of white vinegar into a tall clear glass cup. The vinegar will create a fun reaction with the baking soda rocks.

Step 11: Put Your Rock in the Cup

Drop one of your dried leprechaun rocks into the cup of vinegar.

Step 12: Watch the Magic Happen!

Watch as your rock fizzes and dissolves, revealing the hidden coin inside! It’s a magical and exciting moment that kids will love.

The Educational Twist:

This activity is a great way to introduce kids to simple chemistry concepts. The fizzing reaction is a result of the baking soda (a base) reacting with the vinegar (an acid), which releases carbon dioxide gas. It’s a great visual way to explain chemical reactions to children and grow curiosity about science.

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