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Make a quick and easy filter from household materials. A filter will catch any solids suspended in a liquid and filter them out. By using a filter, learners can discover amazing things. Try filtering a mud puddle or a glass of Kool-Aid.

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
5 to 10 minutes

Estimated Materials Cost:
1 cent - $1 per student

Age Range:
Ages 4 - 8

Resource Type:


Materials List (per student)

  • scissors
  • paper towel
  • funnel
  • pencil
  • container that fits with the funnel
  • liquids you want to filter, mud, Kool-Aid


  • Physical Sciences
    • States of Matter
      • Solids
      • Liquids
  • The Nature of Science
    • The Scientific Process
      • Asking Questions
      • Conducting Investigations


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, Science Museum of Minnesota, 1995

Funding Sources:

  • Unisys
  • Science Learning Network
  • National Science Foundation