Black Glue and Salt Watercolor Rainbow - One of our Favorite Rainbow Activities

With all the rainy weather this month, it is the perfect time for some fun rainbow activities. We love rainbows at our house and have made Rainbow Jello and Rainbow Fruit Loop Towers. We recently made a rainbow using black glue, salt and watercolors. I am in love with the vibrant, textured rainbows we created, and am excited to share how your kids can create them as well.

Black Glue and Salt Watercolor Rainbow - One of our Favorite Rainbow Activities - perfect for St. Patrick's Day or Spring.

You will need:
  • Salt
  • White glue
  • Black paint
  • Watercolors
  • Pencil
  • White paper
rainbow activities

To make black glue, empty your glue bottle so it's only half full. Then add some squirts of black paint. Use enough black paint to fill up an additional quarter of the glue bottle. Shake the mixture until it is totally combined. 

Draw a rainbow on a sheet of white paper and outline it with the black glue. Let this dry for a few hours until the glue has hardened to the touch.

Now it's time to start painting. If you have younger kids who have trouble remembering the colors of the rainbow, you can paint a dot of the correct color into each section so they can follow along.

watercolor rainbow activities

My kids were careful to stay within the lines of black glue, but I think having the colors blend would look great too.

rainbow activities

Make sure your painting is fairly wet before adding salt. If parts of it have dried already, have your child go over it again with a wet brush.

watercolor rainbow

Next, add your salt. A shaker works great here so that kids can shake the salt on themselves.

salt and watercolors

Leave the salt on until the painting dries and then you can shake off the excess.

rainbow art project

You will be left with a vibrant rainbow painting which has a sandy texture. If you are looking for rainbow activities, this is one that will brighten up any rainy day.

rainbow crafts for kids

Rainbow Crafts for kids - Black glue and salt watercolor rainbow. This is one of our favorite rainbow activities!

For more fun with black glue check out:

Hearts with Black Glue - looks like stained glass! So easy to do.

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  1. What a great activity, Vicky. I love it. I don't think I've seen this technique before. The kids would so enjoy it. Thanks!

  2. Thank you so much for posting this! I was just asking the craft store in town today for black glue; they looked at me really weird too. Hooray!

  3. My daughter LOVES water colors and we will have to try this!

  4. How create and I love that it only involves simple ingredients. I hope you'll consider sharing this at Look What We Did, a month long link up hosted by HammockTracks. -Savannah @ HammockTracks

  5. I love this craft. I would love it if you would post this on my Money Saving Monday Link Up.

  6. Visiting from the Pin It Party. My Family-Focused Monday hop is live now and I would love to see one of your awesome posts linked up @

    Have a wonderful week.

  7. Congratulations! This post is featured over at Diana Rambles today and has been pinned in the Featured at Diana Rambles board at Pinterest. Please grab a featured button off my sidebar or via the link under the features. Thanks for sharing this awesome idea!

  8. Such a beautiful project! Thanks so much for sharing at After School.