Rainbow Volcano

Get 25% off the first month of your new craft box subscription with code BLOG25! Green Kid Crafts delights tens of thousands of kids across North America each month with fun and eco-friendly craft and STEM activities delivered right to their door through our company’s craft subscription box program. Kids are sent a monthly Discovery Box, which is packed with between 5-8 activity kits designed to foster a child’s creativity and confidence. Each month brings a new theme; past themes have included Mad Scientist, Nocturnal Animals, Around the World, and Outer Space. Our team of kid testers help design each Discovery Box as well as the fun activities and projects for our blog like this one!

Create a river of cascading colors in this twist on the classic erupting volcano science experiment. Read on for instructions on making a rainbow volcano!


  • Mason jars
  • Baking Soda
  • Vinegar
  • Small dish/container
  • Food coloring


Step 1: Add about two tablespoons of baking soda to each jar.

Rainbow Volcano

Step 2: Next, add about five or six drops of food coloring to each jar.

Rainbow Volcano

Step 3: Finally, we added vinegar to a large mixing/pouring bowl where it will make it easier to pour quickly into each jar.

Rainbow Volcano

Step 4: Quickly pour the vinegar into each jar until the reaction is overflowing creating a rainbow of overflowing colors!!

Rainbow Volcano

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From $16.95 / month! Monthly boxes come with 4-8 award winning Creativity and STEM Science Kits (science, technology, engineering, and math) designed by experts around national standards to build confidence, flex creativity, and make kids smarter. All materials and instructions included, along with some fun extras! Each Discovery Box is created around an exciting new theme each month (think Outer Space, Nocturnal Animals, Backyard Science, Ocean, and Mad Scientist). You can cancel anytime. Join Green Kid now and save 25% off your first month with code BLOG25.

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