Fill each cup with 1/2 c. water. There should be 6 total cups.
For each color, add 1 tsp of acrylic paint to each cup and stir in the color. (red, orange, yellow, green, blue, purple)
Divide your cotton balls into 6 piles of 20 cotton balls.
Start with the first pile, pull each cotton ball apart a little bit and place in the jar. We used 15-25 cotton balls per layer. You want the cotton balls to absorb the liquid to show each color in the jar.
Use the popsicle stick to gently push the cotton balls down.
Sprinkle glitter on top of the cotton balls.
Slowly pour the first color of paint on top of the cotton balls. We found that it turned out best when we poured into the middle. We started with the color purple.
Use the popsicle stick to gently move the cotton balls around until they absorb all the paint. You can add more cotton balls as needed, but make sure not to add too many that parts of the cotton balls are left white. If that happens just mix up a little more paint and water mixture and pour it in.
Repeat the layers in this order: (purple, blue, green, yellow, orange, red)
15-25 separated cotton balls gently pressed down with a popsicle stickGlitterOne color of paint slowly poured into the middle Cotton balls gently moved around to absorb the extra paint
Secure the lid on the mason jar.
Optional: Add washi tape around the rim of the lid. Now you can enjoy a rainbow without a cloudy day :).