Rainbow Seed Science Experiment

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Rainbow Seed Science: Molecules for Young Learners!

“Taste the Rainbow” a new spin on a classic experiment!
This science experiment is so much fun for both kids and adults. Perhaps I am speaking only for myself and a few other colorful individuals (wink). Since the push for STEM programs many program creators have started with a science experiment that can be easily conducted. Children are very familiar with seeing the rainbow making experiment from Skittles. It is really neat to see the rainbow appear, right before their eyes, its almost magical. When our volunteers saw what we were doing the experiment they gasped, “Oh, we did this at STEM camp.”

At first I was a little taken back when I shared we were conducting this experiment. One of the volunteers was only in kindergarten, although she was very excited to see the wonders of the rainbow, again. I am one of those kinds of people who needs to know “why.” I also believe in the theory of constructivism. Simply defined as, “children learn by building and constructing new ideas from their old ideas.” I asked if they knew why and how the colors moved, and they said from the water. Good start, I thought! Repeating this experiment with my lesson was going to be a learning experience for these kiddos, piggy backing on what they already understood. This is why and how we conducted this experiment.

Before conducting the experiment I recommend watching this video called “The Science of Light and Color for Kids: Rainbows and the Electromagnetic Spectrum.” This is a refresher for adults, both caregivers and teachers of young children. The video is intended for upper elementary students, but is perfect for adults. We need to be prepared to answer any questions the kids might have about rainbows and color. Click on the image with the rainbow umbrellas to watch the video.

Color and Light Video (4:37)

Tools & Materials

Rainbow Seed Science Tools
  • Rainbow Seeds (Skittles)
  • White round plate
  • Timer or stopwatch
  • Paper towels
  • Warm tap water
  • Cold tap water
  • Science Journal
  • Markers
Rainbow Seeds Science — Before

Method of Experiment

  1. Watch preview video on hot and cold (see link below).
  2. Talk about and introduce molecules (see below).
  3. Wash hands (even though we don’t eat science – this is an exception).
  4. Review Science Journal sheet and make predictions, using the Scientific Method.
  5. Arrange the rainbow seeds in a pattern around the white plate.
  6. Pour cold water in the center of the dish until it reaches the outer edge of the rainbow seeds.
  7. Using the timer, time how long it takes for a rainbow the reach the center of the plate. (Record results in Science Journal sheet/or journal)
  8. Repeat steps 5-7 on a clean plate, using warm water.
Rainbow Seeds Science — After

Day of the Experiment

Technology is so important in today’s learning world. I implement it whenever possible, not as a substitute for learning or anything hands-on. Once the kids were ready to get started with the experiment we watched this short video clip on YouTube created by Scott Milam. WARNING: There is no sound and you will have to explain a little about what is going on in the video.

“Food Coloring + Hot and Cold Water” (1:52)
Here is what we did. This is an excerpt taken from the St. Patrick’s Day STEMHAX Guides page, “We started with a mini-lesson and this simple video. There is no sound, and it was perfect for explaining molecules. The kids were interested, even with no sound. I explained how the blue was the cold and the red was the hot. Each beaker had the same ingredients; one cold and one hot. Easy! I then shared that molecules are everywhere, they are like energy. “In the summer when running around you get really hot, it’s because you are moving fast, and that is representative of the hot/warm water.” And the snow is cold (so those molecules go really slow). Finally, the kids made predictions and used the science journal to predict and record their data.”      
Making a Rainbow Seed Pattern.

Two for One!

We doubled up on the supply list, and conducted the experiments at the same time. We gave one of the kids the C for cold and the other was W for warm. We used the Scientific Method; a lighter version more appropriate for young learners. All pages needed for this experiment are included in the digital download for the “Rainbow Seeds Science Experiment.”
Let the Experiment Begin!

The Research Assistant’s Guide is designed for teachers, homeschool teachers, substitute teachers and anyone who is conducting this experiment. The Scientific Method for young learners includes: Observation, Questions, Predictions, Experiment, Analyze Date/Evaluate and Share. Our guide will help ask the right questions and guide the child through the Scientific Method and this experiment.

Recording the Data on the Science Journal Sheet.
There are many ways to extend this experiment. You can use your own judgment on where and how to proceed based on the ah-ha moments the kids have during the experiment. The kids truly enjoyed conducting this experiment and probably didn’t realize we were guiding them through the Scientific Method, but they got it! Below is a link to a time-lapse video we put together, Enjoy!
Time-lapse (:59 seconds)

This experiment was originally St. Patrick’s Day inspired! At the end of the rainbow there is supposed to be a pot of gold. We thought this worked well with our “The Night Before St. Patrick’s Day” Companion and Activity Packet. Rainbows are plentiful in the spring and summer and we decided to offer the download as a “Rainbow Seeds Science Experiment.”

EXTEND: Art and the color of the rainbow pair well with each other in academics. Our favorite art teacher is Rob from “Art Hub for Kids.” Click on the rainbow picture for a YouTube instructional for kids. This is where art and technology really make a positive influence for people like myself, who would rather leave the art instruction to a professional. Kids LOVE Rob and his kids. The video is 13 minutes long, however, when I am working with kids it is good to pause the video so they don’t get frustrated as they try to keep up. Older children can just follow with no need to pause the video.

How to Draw a Rainbow (for young artists) (13:05)

We had so much fun putting this Rainbow Seeds Science Experiment together and look forward to hearing how much your kids enjoyed conducting this experiment. Thank you, see you soon!

Digital Download