AWESOME Rainbow Experiments With Kids
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Making rainbows with kids is SO much fun! In this post, I’ll share some incredible rainbow science experiments that are simple, exciting, and educational. Whether you’re exploring light refraction, absorption, or polarization, these experiments will bring colorful learning to life.
To make this even more engaging, pair your rainbow experiments with the delightful book A Rainbow of My Own by Don Freeman. This heartwarming story follows a little boy searching for a rainbow, leading to a whimsical imaginary adventure. It’s a perfect read-aloud to spark curiosity before diving into hands-on rainbow science! My kids and I love this book!
These rainbow experiments that we did go perfectly with the book. (See also my Rainbow Science With Absorption post!)
Simple and Amazing Rainbow Science Experiments
1. Make a Rainbow with an Old CD
Materials:
- An old CD
- A sunny window or flashlight
Instructions:
- Hold the CD under direct sunlight or shine a flashlight onto its surface.
- Tilt and move the CD to reflect light onto a wall.
- Observe the stunning rainbow that appears!
Science Behind It: The surface of a CD is made up of tiny grooves that act as a diffraction grating, bending and separating light into its different wavelengths, which appear as a rainbow!
2. Create a Rainbow with a Glass of Water
Materials:
- A clear glass of water
- A white piece of paper
- Direct sunlight
Instructions:
- Fill a clear glass with water and place it near a sunny window.
- Hold a white paper under the glass.
- Watch as the sunlight refracts through the water, creating a rainbow below the glass!
Science Behind It: This experiment demonstrates refraction, where light bends as it passes through water, splitting into the colors of the spectrum.
3. Rainbow with a Prism
Materials:
- A glass or plastic prism
- Sunlight or a flashlight
- A white wall or paper
Instructions:
- Place the prism in a sunny spot or shine a flashlight through it.
- Adjust the angle until you see a rainbow appear on the wall or paper.
Science Behind It: Prisms bend light at different angles, separating white light into visible spectrum colors (red, orange, yellow, green, blue, indigo, violet).
4. Diffraction Grating Rainbow Glasses
Materials:
- Diffraction grating sheets or rainbow glasses
Instructions:
- Look through diffraction grating glasses at a light source.
- Observe the rainbow patterns around the light!
Science Behind It: The special film in these glasses splits light into a rainbow by bending and spreading out wavelengths, just like the grooves on a CD.
5. Polarized Light Rainbow Experiment
Materials:
- Polarizing film sheets
- Clear shiny tape
- A glossy sheet protector
- Sunlight or a bright light source
Instructions:
- Tape multiple overlapping pieces of shiny tape onto a sheet protector.
- Place a polarizing film over the taped area.
- Hold it up to a light and rotate another piece of polarizing film on the other side.
- Watch as the colors change!
Science Behind It: Light waves travel in multiple directions. Polarizing filters block certain light waves, and when rotated, they reveal a shifting rainbow effect caused by interference and polarization.
See it in action! Isn’t it amazing?!
With these fun and easy rainbow experiments, your kids will get hands-on experience with scientific concepts like refraction, diffraction, and polarization while having a blast. Try them out and let me know which one was your favorite!
What other rainbow activities do you love? Share your favorites in the comments!
See More Rainbow Science Projects and Activities:
- Rainbow Walking Water Experiment
- Jumbo Rainbow Collage
- Rainbow Woven Lanterns
- Q-Tip Rainbow Painting
- Rainbow Weaving
- Rainbow Stained Glass Window
- Roll a Rainbow- Math Game
- Rainbow Icosahedron Balls
- Twirligig~ Rainbow Paper Spinner Toy
- Roll a Rainbow Preschool Math Game
- Rainbow Mentos & Soda Geyser
