How can we head into March and not start thinking about rainbows? With all this snow, it’s the only hope I have for warmer weather. At least our days are longer with sunlight. It use to get depressingly dark at 5 pm which makes the winter days long. Rainbows are full of color with bright warm days ahead.
This fizzy rainbow science fun will guarantee squeals of laughter and a great amount of fun. Watch their faces lighten up when they see what happens to their beautiful rainbow. And for more fizzy science, don’t forget to check out other Fizzy Experiments Your Kids Will Love.
- 3 cups baking soda
- 6 colors of tube watercolor paint (red, orange, yellow, green, blue, purple)
- about 6 oz water
- 1-2 cups vinegar
- Squirt bottle, medicine droppers, or spoons
- a large tray or cookie sheet
- Flour sack towel or paper towel
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Fizzy Rainbow Directions
Mix a squirt of watercolor paint, and enough water to blend the color into 1/2 cup baking soda until the color is smooth.
Lay globs of red onto the sheet forming an ark.
Line each color in order under the ark before touching the colors to each other.
Lay paper towel over the top of the rainbow to dry excess liquid. You can do this the night before to allow it time to dry for more fizz.
Have your children pour vinegar over the rainbow and watch it fizz.
Ask them what they think about the chemical reaction, what they observe with the colors and what they think will be left when it is over. Hint: everything is light brown.
Encourage children to touch the fizzy rainbow.