Let’s learn how to make magnetic slime!

Magnetic slime just might be the coolest slime recipe we’ve made yet, and you know how much we love making homemade slime.  This magnetic slime recipe is part science experiment, part magic and part slime fun and great for kids of all ages.

The slime’s secret ingredient is black iron oxide powder…

My son played with his own magnetic slime stuff for hours — he loved setting our magnet on the slime and watching it get swallowed up. He watched while setting the magnet near the slime and watching it crawl toward the magnet.

It just really is that cool!

This slime recipe requires adult supervision.  Small children should not touch the black iron oxide powder or play with the strong neodymium magnets.

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How to Make Magnetic Slime

Supplies Needed to Make Magnetic Slime Recipe

• 6 oz white school glue
• 1/4 cup water
• 1/4 cup liquid starch
• 2-4 tsp black Iron Oxide powder – also called ferrous oxide powder or ferrous powdered metals
• Neodymium Magnet
• Medium sized mixing bowl or a large plastic cup
• Something to stir with like a craft stick

Directions to Make Homemade Magnetic Slime

Step 1

With everything at room temperature, add the white glue to a bowl and stir in the water. Once the glue mixture is fully incorporated, add the liquid starch, and stir until it starts to come together with a craft stick.

Step 2

Remove the slime from the bowl and knead it, stretching it to make it more pliable.

At this point, you have a bunch of white slime.

Yay!

Step 3

Now it’s time to add the Iron Oxide powder.

This is what makes the slime magnetic because it has little bits of iron.

Make a small indention in the top of the slime and add a teaspoon of Iron Oxide powder.

Step 4

Fold the slime over the powder and knead it to incorporate the powder throughout.

The slime will turn black like you just added dark paint!

Repeat the process to add enough powder that the slime reacts to a neodymium magnet. <–this will  not work with ordinary magnets.

You can see how the magnet will pull some of the slime from the rest stretching the black slime.

Magnetic Slime Storage

Store your magnetic slime ball in an airtight container.

What are Neodymium Magnets?

Neodymium magnets are rare earth magnets or a permanent magnets made from neodymium, iron and boron.  Because neodymium magnets have a strong magnetic field, be careful when using two together.  Unlike regular magnets, they can strike each other forcefully.  You don’t want to be pinched in the middle due to the powerful magnet.

Watch how the magnetic slime “swallows” up the magnet!

See how far you can twist and pull the slime without it breaking.

Isn’t it fun?

Frequently Asked Questions about Magnetic Slime

Q: What is magnetic slime?

A: Magnetic slime is quite literally slime that has a magnetic force. This slime will attract another magnet!

Q: How do you make magnetic slime?

A: Magnetic slime contains iron oxide, which is magnetic! 

Q: Is magnetic slime safe for kids?

A: It’s safe if children refrain from eating the slime and wash their hands after playing with it.

Step by Step Directions Review – Magnetic Slime Recipe

Yield: 1 batch

Magnetic Slime Recipe

Print

This homemade slime recipe has a secret ingredient that makes it magnetic slime. Play with it with a magnet to watch how the slime moves without touching it! It is a really cool slime recipe that feels a little magical.

Active Time 10 minutes

Total Time 10 minutes

Difficulty Medium

Estimated Cost $10

Materials

• 6 oz white school glue
• 1/4 cup water
• 1/4 cup liquid starch
• 2-4 tsp black Iron Oxide powder

Tools

• Neodymium Magnet
• Medium sized mixing bowl
• Something to stir with

Instructions

1. Add school glue to bowl and stir in the water. Mix until combined.
2. Add the liquid starch and stir until it comes together.
3. Remove the slime from the bowl and knead it to make it more pliable.
4. Make a small indention in the middle of the ball of white slime and add a teaspoon of Iron Oxide powder. Fold over and gently knead it to incorporate - the slime will turn black.
5. Repeat the process adding enough powder that the slime reacts to a neodymium magnet.

Notes

This should be supervised. Children should not put their hands or the slime in their mouth.

kids love this, they’ll also love our magnetic mud experiment. You can even recycle your magnet for that project.

More Slime Recipes from Kids Activities Blog

This amazing goo makes a really cool science project.  Here are some more science project ideas for kids…

• Let’s start with how to make galaxy slime – what a fun DIY slime recipe!
• I don’t know how else to say it…snot!  This snot slime recipe is cool and gross.
• This edible slime makes a really cool gift.
• Slime green eggs and ham…need I say more?
• Best slime shops on the internet!
• Snow slime recipe that is super fun to make!
• 2 ingredient slime has never been so colorful!
• Slime kits are super fun for kids month after month…
• Fortnite slime with its own Chug Jug.
• Glowing slime is easy to make and super fun.
• Make dragon slime!
• Homemade slime recipes that are perfect for kids.
• Christmas slime is very festive.
• Froze slime…as in Elsa, not the temperature!
• Let’s make homemade unicorn slime.
• We have a bunch of slime recipes without borax.

What is your favorite part of the magnetic slime?