Are you excited for the new Star Wars movie to come out! Do you love slimes? We do. We do! Our fun and easy Star Wars slime has a cool twist. It glows in the dark! Dig out your LEGO light sabers and make our Star Wars slime for neat sensory and science play any day!

Lego Light Saber Star Wars Slime

Star Wars Slime light saber Slime Glow in the dark slime science

Easy to make glow in the dark slime for the Star Wars fan!

We turned one of our favorite slime recipes into a Lego Star Wars slime for  May the 4th Be With You Blog Hop! Our easy liquid starch slime recipe plus one simple ingredient makes an awesome glow in the dark slime.

We used some of our favorite Lego guys and light sabers to makes this awesome Star Wars slime for cool science. Check out our whole STAR WARS THEMED STEM IDEAS for the 4th too.




Liquid Starch

Elmer’s Washable White School Glue


Glow In The Dark Paint

Container, Measuring Cup, Spoon

READERS: We have given each of our slime recipes there own page to properly show the instructions. Please click here or the black box above for the glow in the dark slime recipe.

glowing slime sensory play ideas


I made one simple addition to our glow in the dark slime recipe. When I mixed the glue and water together, I added about 3  drops of blue food coloring to give this light saber Star Wars slime a subtle glowing blue color.

Light Saber Activity Star Wars Slime Glow in the dark slime


What’s the science behind the slime? The borate ions in the starch {or borax powder or boric acid} mixes with the PVA {polyvinyl-acetate} glue and forms this cool stretchy substance. This is called cross linking!

The glue is a polymer and is made up of long, repeating, and identical strands or molecules. These molecules with flow past one another keeping the glue in a liquid state.

The addition of water is important to this process. Think about when you leave a gob of glue out, and you find it hard and rubbery the next day.

When you add the borate ions to the mixture, it starts to connect these long strands together. They begin to tangle and mix until the substance is less like the liquid you started with and is thicker and rubberier like slime!

 Read all about the science behind the slime for young kids here. 

We added as many light sabers as we could find to decorate our Star Wars slime. Then some of our favorite LEGO Star Wars characters to join us. 

Lego Star Wars Slime

Our easy slime recipe has taken on so many themes for season and holidays. We love Legos and Star Wars, so it was a lot of fun for my son to mix the two together. Store your Star Wars slime in a plastic container with a loose lid to enjoy all week long.

Please make sure to wash hands and surfaces thoroughly after playing with slime. It is a chemistry experiment after all!

Star Wars Slime Star Wars Activity

Most of our Star Wars slime play happened in a dim room. We would charge the slime with the lamp and play until it went dim and recharged it over and over again. It’s not easy to get glow in the dark photos, but you get the idea. It’s pretty cool just the same.

YOU CAN ALSO MAKE: Star Wars Play Dough Invitation To Build

Star Wars Play Light Saber Slime

This Star Wars slime is not messy on the hands but loves to spread out. Slime is a true liquid but a thick one. It’s fun to hold it and let it ooze right out of your hand. Some slimes like our homemade flubber or our sand slime are super stretchy.

ALSO CHECK OUT: Star Wars Ice Melting Science Activity

Star Wars Glow in the dark slime

Act out your own Star Wars adventures with out Glowing Light Saber Star Wars slime.

Star Wars Glow in the Dark slime with homemade slime recipe-2




See what other awesome ideas are being featured for Star Wars Day!

Star Wars Tatooine Desert Sensory Bin– Frogs and Snails and Puppy Dog Tails

Star Wars Family Fun for May 4th – Mama Smiles

Star Wars kids’ embroidery: Yoda quote – Hodge Podge Craft

Star Wars R2-D2 Craft for Kids – Mom Inspired Life

Make Your Own Star Wars Landscape – Planet Smarty Pants

Yoda Puppet Star Wars Craft – Coffee Cups and Crayons

Counting Blocks Light Saber – Sugar Aunts

Awesome Star Wars ABC Games with Printable- JDaniel4’s Mom

Star Wars Children’s Books – Kelly’s Classroom

Make a Toilet Paper Roll Yoda ‎ – Kitchen Counter Chronicles

Crayon Resist Death Star – Fun-A-Day!

Light Up May the Fourth Be With You Cards – Left Brain Craft Brain

Star Wars Day Perler Bead Pattern R2-D2   Brain Power Boy

LEGO Star Wars Putty – The Pleasantest Thing



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