Glowing Radioactive Slime

This is the coolest thing we've done in a while!
After a chat with my friend Kate from laughing kids learn about glow play & UV lights, I was inspired to start glowing experiments with Dimples because its been a while since our last glow play (Glowing Dragon Eggs) and it just happened that I had a jar of glow water but wasn't sure what to use it on.
Something different!

I wanted to make a slime that worked both ways because not every one has a UV light globe handy. So this slime is great for all occasions; it looks a little like gak through the day. 
Keep it in the fridge and its shivery cold to touch. 

Works well with a potato mash, funnels and grates that the slime can ooze through. Fill up a cup and watch it flatten,  fill up a funnel and watch it slowly descend.

Turn on the UV light and its radioactive, it glows vibrant & bright! Add some bright white googly eyes and it gives it a crazy spooky look under the UV light. If you haven't got a UV light I highly recommend it, it makes everything look so much brighter and definitely puts the GLOW in glowing play. 

Turn out all the lights and it still glows.
A subtle mystical glow, very intriguing and just as slimy. 

Making slime is a great lesson in chemistry (for school age children) it shows how substances react, mix, how liquids can become semi-solid. How borax dissolves, how it glows & scientific exploration regarding how substances move, sink and gravity. 

This is a Great sensory activity, especially if you store your slime in a zip lock bag in the fridge between play. It will not only feel smooth, look slimy but be shivery cold and have a clean gak kind of smell. 

How to make Glowing Radioactive Shivery Slime. 
You need Elmer's glue or Pva glue mixed with water at a ratio of 1 cup glue to 3/4 cup water.
If you have a UV light- use glow water or glow paint (highlighter ink infused water or UV/Fluro paint).
or if you want it to glow in the dark add glow in the dark paint.
If you would like it coloured add food colour here.
Or do all three if you want it to be radioactive green, UV and night glowing slime. Like our is. 
Mix well with a whisk or fork in a bowl and keep separate for a moment.
In another bowl dissolve a table spoon of borax in half a cup of hot water. 
Mix the two together in a zip lock bag and pop it in the fridge if you want it to be shivery cold slime. 
Have fun.
Learning concepts:
Sensory exploration

Cutting the snotty gak - scissor practice
Experiment with different colour
Use clear glue vs white glue
What else can you make glow?
Other textured slime - Monster gellatine Slime
Happy Adventures


  1. ooh using a potato masher with the slime looks like fun! I must remember that!
    I keep pondering whether I should buy a UV light so I can do some of these cool activities... how dark does it need to be to work?

    1. Basically the darker the better but the light picks up whites anywhere it shines in the room :-) our spare room has blackout curtains but during the day it's not completely dark & this is when we did this

  2. That does look cool! And lots of fun! And the masher is a great idea too. Must remember this one :)

  3. That looks so cool - I have always wanted to try my hand at Gak and glow gak is even better!

  4. You have convinced me! So, it glows in the dark without the UV light? We have a four year old monster party coming up...and Halloween...this stuff will be the hit of the party! Thanks :)

    1. It does if you add glow in the dark paint in with your glue/ water first. I would recommend getting the uv light, it glows tenfold better but just a normal glow slime would depend on the quality glow paint you could get your hands on & how much you wanted to add in I guess. Good luck

    2. Thanks for your reply, I'll look into both those options :)

  5. Oh my boys would have SO much fun with this! May try it for Halloween this year :-)

  6. So much fun! Love seeing it fall through the potato masher.

  7. This is so neat! We will be featuring your post this week on Share It Saturday. Thanks for linking up!
    Colleen at Sugar Aunts

  8. Thanks for allowing me to feature this.