Tuesday, April 5, 2016

Walking Water Rainbow

Our book recommendation this month is “What Makes A Rainbow”. To get into the fun of rainbows my four-year old and I decided to make one using the Walking Water method in our book “The Curious Kids’ Science Book” by Asia Citro. The book has been a great resource for us and is geared for kids ages 4-8. There are also many resources online.

I kept this experiment pretty simple and used it as a tool to talk about what happens when colors mix instead of the science behind how the water walks. For more information on the science portion of the experiment check out this website. We started the project right after breakfast because I had read that it can take several hours. It took until dinner time before we had a rainbow.

Here’s what you will need:
  • 6 clear cups
  • Food coloring - red, blue, and yellow
  • 3 paper towels
  • Something to stir
  • Baking pan
  • Towel
  • Aprons (to save your clothes)
  • Tablecloth (to save the table)
  • 3 cups water (or whatever you chose)
  • Measuring cup

Here’s how we did it!
  1. PUT ON APRON and layout tablecloth! Line a baking pan with a towel. I have a craft baking pan that was purchased from the dollar store, this saves my sanity from having my stuff ruined. Place the 6 cups in a oval shape, ensuring the cups are touching each other. Cut the paper towels into 2 strips lengthwise, for a total of 6 strips. Fold the strips of paper towels and place in the cups so one end is in one cup and the other is in the cup next to it. Each cup will have two ends of a paper towel in it. See the picture below.
  1. Pour 1 cup of water into three of the cups as shown in the picture above. Each cup with water will be “attached” by a paper towel to a cup without water. Place 6 drops of food coloring into a cup with water (one color per cup) and gently stir. Place the experiment in a safe place and if possible still visible.
  1. Patience
  2. More Patience - should be able to see the colors starting to “walk” up the paper towels and into the empty cups.
  3. Are we there yet?
  4. Check the experiment - for us it took about two hours before we had our first new color.
  1. Check again …….
  1. And again ….
  1. And again …… we finally had a rainbow by dinnertime!

We had fun with this project. It was simple to set-up, and was something for us to look at all day. We even let it sit overnight to see what would happen. If you have any questions or neat discoveries share them with us!

Written by: Shawna

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