Guar Gum Slime

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In this activity, learners create a gelatinous slime using guar gum powder and borax. Educators can use this simple activity to introduce learners to colloids. This activity page features a fun how-to video that shows learners and educators how to make the slime.

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
30 to 45 minutes

Estimated Materials Cost:
$10 - $20 per group of students

Age Range:
Ages 6 - 18

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • Guar gum powder
  • Borax
  • Water
  • Two bowls
  • Food scale/balance (in grams)
  • Measuring cups/spoons
  • Food coloring or any water-based coloring


  • Physical Sciences
    • Chemistry
      • Solutions
    • States of Matter
      • Solids
      • Liquids
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations

Informal Categories

  • Food and Cooking
  • Toys


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, Children's Museum of Houston, 2010