Who doesn’t love an easy slime recipe with a hidden surprise inside. This treasure slime is a perfect gift to make and give to friends or make to surprise your kids! We love making homemade slime recipes and feel we have some of the best slime making recipes out there. Find a fun (washable) treasure, and let’s get started.


Make an easy slime recipe with a hidden surprise inside. Our basic slime recipes are quick and easy. Learn how to make slime in a snap. We show you how to master slime with basic slime recipes everyone wants to learn how to make!

You will definitely want to grab a few fun containers or even plastic eggs or those refillable Christmas ornaments for your hidden Surprise slime! You can see how we use the plastic eggs here and Christmas ornaments here.

I love this easy slime recipe! The slime ingredients are pretty universal, and it’s easy to whip up in a few minutes. The kids can have tons of fun picking out colors and mixing in glitter too.

We have 4 basic slime recipes you can check out. They include our fluffy slime recipe, saline solution slime recipe, liquid starch slime recipe, and borax powder slime recipe.

For this easy slime recipe and hidden surprise slime video, we are going to show you how the saline solution slime works.

Make sure to grab the free printable slime recipe cheat sheet below. Plus check out all our slimy resources including some basic science behind the slime at the end of this page.

STOP! Watch the video first. The end is super cute.


It’s important to gather the right supplies for the job! We have a handy recommended slime supplies page with a printable shopping list too. See the brands we like to use!


I will provide some Amazon commission links at the very bottom of this page to give you some ideas of supplies that will be good for this slime project.

1/2 Cup Clear PVA School Washable Glue

1/2 Cup Water

1 Tbsp Saline Solution (must contain boric acid and sodium borate or it won’t work!)

1/2 Tsp Baking Soda

Food Coloring

Glitter and Sequins

Fun Washable Plastic Figurines



Scroll through the pictures and find the step by step directions below! You will also find more handy resources and a bit about the science behind the slime at the bottom of this page.

Make sure to try our fluffy slime recipe using saline solution with all your extra ingredients!

Set up your slime making ingredients, and let’s get started with our hidden surprise treasure slime.

EASY SLIME RECIPE STEPS : Make this slime in minutes!

If you would like to see more picture steps, click here.

Mix your clear glue and water in a bowl and stir thoroughly.

Next added desired food coloring and mix.

Add 1/2 tsp of baking soda and stir to mix.

Time to add the glitter and sequins as desired.

Finally add the slime activator, 1 tbsp of saline solution.

Mix vigorously until slime pulls away from side and bottom of the bowl and it becomes a blob!

Coat hands with a bit of saline solution and knead slime in the bowl or on a tray for desired consistency.


You have the BEST EVER easy slime to play with and hide a surprise for your kids or friends. Add your hidden surprise slime to a container and you are ready for hours of slimy fun.

Slime is amazing tactile sensory play for kids. You must try it at least once.


What’s the science behind the slime? The borate ions in the slime activators  (sodium borate, borax powder, or boric acid) mix 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. Until…

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 thicker and rubberier like slime!

Picture the difference between wet spaghetti and leftover spaghetti the next day. As the slime forms the tangled molecule strands are much like the clump of spaghetti!

Is slime a liquid or solid? We call it a Non-newtonian fluid because it’s a little bit of both!

Read more about slime science here!


You will find everything you ever wanted to know about making homemade slime right here, and if you have questions, just ask me!

Did you know we also have fun with  science activities too? We also love to experiment with all kinds of simple to set up science experiments and STEM activities.  Click on all the black boxes below to learn more.

Check out these Amazon commission product links for ideas!