How to Make a Sparkly DIY Galaxy Jar

Galaxy Jars also known as Sensory bottles or calm down jars are fun for kids, but what if your kids, no longer call themselves “kids”?  But they still love crafts?  This galaxy glitter jars project is the sensory bottle that is a gorgeous craft for kids of all ages.

text: DIY Galaxy Jar - Kids Activities Blog - finished glittery galaxy jar held by child on white background
Let’s make a glittery galaxy bottle!

Let’s Make a Galaxy Jar

This glowing galaxy in a jar is fun and easy to make – the more “grown-up”  version of our Counting Stars Glowing Bottle, do not require mom’s involvement (even younger elementary kids can make them independently) and the finished product is great to put on display near a bed.

Related: Our Counting Stars Glowing Bottle Craft

Follow the easy step by step instructions below to make this fun craft filled with layers of cotton balls all the different colors of the galaxy night sky.

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Supplies Needed for Sensory Bottle Craft

How to Make Your Own DIY Galaxy Jar Craft

Step 1

Step 1 - How to make a galaxy jar - bottle 1/2 full of cotton balls with water being poured in by child
This is how to start this sensory bottle craft.

Fill your bottle half-full with cotton balls.  You will compress the cotton balls into the bottom of the jar – they will fill the lower inch of the bottle when you are finished.

Step 2

Pour some water into the bottle, enough to saturate the cotton balls.

Step 3

Step 3 - How to make a galaxy jar - how to make galaxy jars - adding drops of food coloring to the cotton balls
Now let’s add some color!

Drip 2-3 drops of food coloring into your bottle.  Add a squirt of glow paint and a dash of glitter.

Step 4

Then – do it all again!  Repeat step instructions: Add more cotton balls, more water, sprinkle glitter and glowy juice.

Keep adding new colors and new layers until your bottle is completely full.  

Tip from Our Experience Making this Sensory Jar Craft

Step 5 - How to make a galaxy jar - use straws or sticks to push down the cotton balls

We found that as the layers grow it gets harder and harder to fill the jar.  Using a stiff straw or wooden sticks to tamper the cotton balls back down  into their layer helps.

Step 5

Put the lid on your bottle securely.  

How to Keep Your Galaxy Jar Fresh & Glittery

As your bottle ages, you will want to rehydrate the cotton balls to keep the blurred “sky look”.

Set the bottle on your windowsill to allow the glow paint to charge.  As your kids drift to sleep they will see a sky, including a glittery milky way looking back at them, from their own galaxy bottle.

finished craft:  galaxy in a bottle

Galaxy Jar Makes Great Kid Made Gift or Group Activity

My tween is making these for all of her friends for  their Homemade Christmas Swap get together.  She is collecting glass bottles!

We have also used this galaxy jar craft as a slumber party craft idea. Then everyone can calm down for bed at night {giggle} and have a souvenir they made home with them the next day to remember the party fun.

Even though a sensory jar would normally be thought of as a sensory activity for younger kids, older kids – teens and tweens – need stress relief too! It can be calming to have a coping mechanism like our dark galaxy jars as a calm down jar for kids of all ages…pssst…and adults!

Yield: 1

Galaxy Jar Craft

galaxy in a bottle

Kids of all ages (even older kids) will love making their own galaxy jar filled with sparkle and starry night sky fun. This easy craft can be used as a sensory tool like a calm down jar.

Active Time 15 minutes
Total Time 15 minutes
Difficulty Medium
Estimated Cost $5


  • Clear glass bottle with a lid – milk bottle, other clear recycled bottle or mason jars work great
  • Cotton balls – lots and lots of cotton balls
  • Glitter
  • Food Dye
  • Water
  • Glow in the dark paint


  • wooden stick, spoon or stiff drinking straw
  • cup of water


  1. Fill the bottom of the jar with cotton balls until your bottle is 1/2 full.
  2. Pour some water to saturate the cotton balls.
  3. Add 2-3 drops of food coloring, squirts of paint and some silver glitter.
  4. Repeat the process over and over again adding new layers of cotton and different color paint and food coloring to give your bottle a dark galaxy glow.
  5. When necessary use a stick, spoon or straw to push the cotton balls compacting them to the bottom of the mason jar.
  6. Add lid.


To refresh your galaxy jar in the upcoming weeks, add some water.

More Galaxy Crafts from Kids Activities Blog

How did your DIY galaxy jar turn out?