Slime is the word! One of the coolest things you can do to wow the kids is slime. We have a ton of slime recipes using various ingredients, from borax to saline solution and even fiber! Learn how to make fiber slime right in the kitchen for a taste-safe slime recipe that is completely borax free. Homemade slime is awesome for hands-on learning.


Learn how to make fiber slime recipe with kids for borax free slime recipes.


This fiber slime recipe is a great alternative if you are looking for a borax-free option or you need a taste-safe option for the kids who still want to test everything out with their mouths! We have a variety of alternative slime recipes to check out and are continually adding more!

However, as tasty as this slime may be, I DO NOT encourage this slime as a snack. This contains a high ratio of fiber powder to water and is not meant to be consumed in quantity. I like to stress that although it is an edible slime, I would consider this recipe more a taste-safe slime. The difference is the amount consumed.

Note: I do not encourage eating sensory play materials whether the recipe is considered taste-safe or edible.

You can whip up 2 cups of ooey, gooey slime in no time. It will continually thicken as it cools too. We tested out several different ratios of fiber powder to water and came out with different textures, including messier to more rubbery. We made a similar taste-safe slime on the stovetop too.

Make oozing fiber slime recipe with kids for borax free slime or taste safe slime


  • Water
  • Fiber Powder
  • Container (Microwave Safe)
  • Microwave
  • Spoon
  • Measuring Cups
  • Food Coloring (optional)


We recommend adult supervision and assistance due to microwave use and HOT liquids.

Step 1: Mix four tablespoons of finer powder and 2 cups of water in a microwave-safe bowl.

Step 2: Microwave mixture on high for 3 minutes.

Step 3:  Carefully remove the container from the microwave and stir. Place back in microwave and heat on high for another minute.


Here’s where you can experiment with the consistency of slime you prefer. We made several batches of slime. For the first batch, we used three scoops. Then we made batches using 4,5 and 6 scoops of fiber powder.

The trick with this fiber slime is that the consistency becomes more slime-like over time. As the slime cools, it continues to congeal. Our largest powder at 6 scoops made a very rubbery and stiff slime. This is great for the kid who dislikes slimey-slime!

Step 4: Carefully remove from microwave again and stir for up to another 2 minutes! The slime will form as you stir. Depending on how much powder you use, the slime will form more or less quickly.

We just kept on mixing!

The slime will continue to congeal over time!

Step 5: The toughest part of making this slime is allowing it to cool down fully before playing with it, but this time the slime will continue to set nicely. Spread the slimy mixture on a cookie sheet or baking dish and place in the fridge for 20 minutes.

You may want to get it made in advance so the kids aren’t frustrated with the length of time it takes to cool.

We enjoyed using tongs to move the slime around while we waited.

If you enjoy new sensory play experiences, this fiber slime is an awesome tactile sensory play recipe.

Step 6: Spread on a plate to help the cooling process.

Remember, this is a borax-free slime! It is edible, but please consider it simply taste safe instead! We have plenty of cool slime recipes to check out here if you want a more traditional slime recipe. Enjoy your slimy experience with kids. We kept our slime for a couple of days in a plastic container.

More Borax-Free and Taste-Safe Slimes

These slime ideas are taste-safe and borax-free, but we do not recommend eating them as a snack! You can find even more taste-safe slime recipes here.

Printable Ultimate Slime Guide

Want to have access to all of these recipes (borax free too) in an easy-to-download guide plus tons of extras? You need our Ultimate Slime Guide. We tested the recipes, so you can enjoy them!


  1. We could never properly make slime because I can’t find borax anywhere! This idea of using powdered fiber might be easier to make though. And did you say saline solution works too? Off to check that now.

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