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Marshmallow Slime Recipe

Slime is a super popular activity for younger and older children. It allows younger children to explore texture and develop their social and sharing skills in a group setting. Older children enjoy slime because it’s fun and quick to make and can help them calm down when they’re feeling overwhelmed.

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Easy to make...and EAT!

This activity is a great way for toddlers to practice their sharing skills with a friend or in a group. Toddlers love to put everything in their mouths and this recipe for marshmallow slime is great for just that! Although it won’t taste that great, educators and parents won’t need to worry about it being toxic. Add food coloring to the slime to experiment with how the slime reacts when mixed.

🤗 Sharing Is Caring: Encourage toddlers to use their words when sharing materials rather than grabbing them from friends. 

💻 The Wonderful World of Slime! There are so many different recipes for slime available online. Explore different recipes with glue, glitter, water, cornstarch and so on to find your favorite!

📅 FYI: This slime recipe will last 2-3 days in an airtight container. After that, it may dry out


For this activity you will need:

1.5 cups of mini marshmallows

1 tbsp cooking oil of choice

1 tbsp cornstarch

Microwave safe bowl



Sensory bin/shallow bin

Food coloring (optional)

Learning Outcomes




Parallel Play


Playing in proximity of peers with similar playthings without an exchange of ideas or things


Step 1:

Place your marshmallows in your microwave safe bowl with the oil on top. Microwave on high for 20-30 seconds stirring every 10 seconds until the mixture is soft.

Step 2:

Take the mixture from the microwave and stir in half of the cornstarch while the mixture is still warm. If it’s too runny, add more cornstarch.  *Optional* add food coloring during this step

Step 3:

Continue mixing with the spoon and your hands until you reach a stretchy, slimy consistency. 

⬆️ For older preschoolers: Older children will be able to make this on their own since it doesn’t involve sharp tools or a stove. Help increase their independence by giving them assistance and guidance when needed/requested. 

⬇️ For younger toddlers: Younger children will love the texture of this slime. If they’re feeling overwhelmed throughout the day, this is a great way to redirect their attention and help them calm down.

Playful Questions

What does the slime feel like in your hands?

What happens when you mix two colors of slime together?

What tools can we use to create shapes from the slime?

How can we divide up the slime evenly between our friends?

What would happen if we added water or more corn starch to the slime?

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