Another fun science experiment is testing out heat sensitive materials. This colour changing slime is so much fun to make. And if your kids are into experiments then this is a good one to do!

My kids and I have tried out all different slime recipes. From see-through to glow in the dark. This one was one of the best -although we do say that about every one we make 😝

But seriously if you haven’t tried this colour changing slime, its a must!

All You Need For This Slime Is;

  • Colour Changing Glue
  • Water
  • Baking Soda
  • Contact Solution

*Make sure you have contact solution with boric acid in it!

Benefits Of Playing With Slime

Playing with slime can be extremely satisfying. Not only is it fun to experiment when mixing different ingredients, it can have many benefits when choosing a sensory activity.

  • It can be extremely calming for children. Children with autism or those with anxiety can decrease stress levels when playing with slime.
  • Slime promotes independent play. Children do need to learn to have some solitary play and slime is a great way for them to do this.
  • It teaches them math and science. Especially when combining different ingredients that will react with one another. Having children assist in making the slime will encourage math skills by measuring.
  • When children have access to slime it helps with fine motor skills. They learn about texture and dexterity. They also have the opportunity to test out their strengths with different types of slime.

Not to mention getting them away from screen time. Children find it very difficult to focus on anything when they are so fixed on screens. Slime and other sensory activities is a good way to break them free of this.

The secret to making slime successfully is usually small amounts of each ingredient, and adding gradually if you need it. The contact solution is what makes it into slime. However if you add too much it can turn your slime rubbery.

Add glue
Slowly add water
Drop in baking soda
Measure out contact solution

How To Make Colour Changing Slime

  1. Start off by pouring a whole 5oz bottle of Elmers colour changing glue into a medium bowl.
  2. Slowly add 1 and 1/4 cups of warm water into the bowl.
  3. Next add 1/2 tsp of baking soda.
  4. The glue will be a slimy runny consistency.
  5. Add in 1 tbsp of contact solution. Make sure it has boric acid in it. This is the best kind to make slime with. You will need to add more contact solution to get the slime to how you want it. Add contact solution gradually whilst stirring.
  6. Once your gluey mixture starts to come away from the sides of the bowl, your slime is almost ready.
  7. Take the slime out of the bowl and knead onto a flat surface. It will be slightly sticky but stretchy once it is at the right consistency.

*If it is too sticky, then gradually add more solution. If it feels too rubbery and not very stretchy, add a little bit of water to it.

Changing It’s Colour

The way it works is by temperature. This colour changing glue has thermochromic pigment in it which reacts when there is a change in temperature. It’s pretty awesome to see. Similarly in the same way a mood ring changes it’s colour.

We discovered that the body heat from our hands was making the slime turn pink. Left at room temperature, the slime then changed to purple!

My kids were amazed by how quickly the slime changed colour by a change in temperature. My son got some ice cubes and used them like crayons drawing around the slime. Because of how cold the ice cube was, our pink slime immediately changed to purple. When left at room temperature it also change to purple.

More Slime Fun!

And if your kids are into playing with slime, check out these cool slime recipes to add to your rainy day activities.

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