How to Make A Rainbow in a Bag

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INSIDE: Rainbow in a Bag is a fun sensory painting activity for kids of all ages. This sensory painting activity is so satisfying that you will want to paint with it too! The best part of this sensory activity is that it’s mess free and safe for even the smallest artist! Are you ready to make a rainbow in a bag?

Books to combine with this Rainbow in a Bag Activity

How to Make A Rainbow in a Bag
How to Make A Rainbow in a Bag


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  • 1 tablespoon of flour
  • 1-2 tablespoons of water
  • Several drops of food colouring (I didn’t have all the colours in my food colouring supply at the time of this activity so I used paint which worked. I still added the flour to the paint for added sensory appeal but it is not necessary if you are going to use paint.)
  • Small Bowls x 6
  • Spoons x 6
  • White cardstock
  • Large gallon sized ziplock bag
  • Packing Tape
  • Painter’s Tape
  • Q-tip

How to Make A Rainbow in a Bag

Grab your supplies.

How to Make A Rainbow in a Bag
How to Make A Rainbow in a Bag

You will need 6 small bowls. Into each bowl mix the flour and 1 tablespoon of water and a few drops of paint. Mix until you have a thick paste slightly thicker than the consistency of ketchup. Add a small amount of water if it’s too thick. If it’s too watery add more flour. The more paint you add the more vibrant the color will be.

Grab a large ziplock bag and insert a piece of white card stock. You may need to cut it to make it fit properly.

Spoon out each colour of the rainbow in order onto the paper.

Seal the bag tightly removing as much air as possible and secure with some packing tape. Then tape the bag to the table using painter’s tape.

Invite your child to use their fingers to move the colours across the page to create a rainbow.

How To Play with the Rainbow in a Bag

Have fun mixing the colours. Talk about all the colours you are creating. When they have fully covered the white paper, have them use their fingers to draw a picture or write their name.

Take another sheet of paper and draw out different lines (ie zigzag or rolling hills) for them to copy on the sensory bag.

Have them make different shapes, letters or numbers. Or just have fun with this awesome sensory bag activity!

Sensory Bag Tip!

If you are nervous about your little one tearing the bag with their fingers nails as they draw, have them use a q-tip or a pair of gloves instead!

What to Do with Leftover of Paint

Didn’t use all the paint you made? Neither did I. So instead of throwing it away I use it another painting sensory bag and saved it for the next day. Set up another rainbow, or place the paint colours all mixed up so them can enjoy making colours!

Age Suitability

This activity is good for kids 2 years and up. My kids are 4, 4, and 7 year old.

Exciting Sensory Bins for Curious Kids

Did you know I wrote a book of sensory bins? Click here for more information Exciting Sensory Bin for Curious Kids. Or grab your copy at Amazon.

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Boring afternoons are made exciting with awesome animal-based bins, like Salty Shark Bay or Yarn Farm. Pretend play bins like Birthday Cake Sensory Play or Bubble Tea Party encourage creativity and imagination. And your kids will have so much fun they won’t even know they’re getting smarter with STEAM (science, technology, engineering, art and math) activities like Sink or Float Soup, Magnetic Letter Hunt or Ice Cream Scoop and Count.

STEAM Activity Book

Looking for a fun activity book for your preschooler or kindergartner? Check out my new book Super STEAM Activity Book: Launch Learning with Fun Mazes, Dot-to-Dots, Search-the-Page Puzzles, and More! ! Click here to learn more or order it now!

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