Turn ordinary pumpkins into a bubbling, colorful fall homeschool science experiment! This fun and hands-on activity is perfect for lessons or weekend family fun. Children will love watching their mini pumpkins erupt with bright colors while learning about chemical reactions using simple household ingredients.

Materials

• Mini pumpkins
• Baking soda
• Food coloring
• Dish soap
• White vinegar
• Knife
• Cutting board
• Cooking tray or pan

Steps

Step 1: Using a knife, carefully cut a circle around the stem of each mini pumpkin to create a small opening.

Step 2: Scoop out the seeds and pulp with a spoon (or your hands if you don’t mind getting a little messy!).

Step 3: Place your pumpkin on a tray or pan to catch any overflow. Add 2–3 spoonfuls of baking soda into the hollow pumpkin.

Step 4: Squeeze in about 12 drops of dish soap—this helps make the “lava” extra foamy and fun!

Step 5: Add a few drops of food coloring—try mixing orange, red, and yellow for a fiery look, or get creative with your students’ favorite colors.

Step 6: Slowly pour in vinegar a little at a time and watch the colorful eruption begin! Keep adding more baking soda and vinegar to keep the reaction going.

We’d love to see your science creation! Make sure to tag us in your homeschool science experiment on Instagram and Facebook.