Mighty Seeds

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In this biology experiment, learners plant soybean seeds in plaster of Paris, witnessing firsthand the mighty power and ability of plants to grow in adverse conditions. This is also an excellent activity to touch upon exothermic reactions, as warmth is created when the plaster is mixed.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
1 to 4 weeks

Estimated Materials Cost:
1 cent - $1 per student

Age Range:
Ages 6 - 11

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per student)

  • Clear plastic cup
  • 5 tablespoons of plaster of Paris
  • 2 or more tablespoons of water
  • Plastic spoon for mixing
  • Dropper
  • 3 soybeans


  • Life Sciences
    • Diversity of Life
      • Plants
  • Physical Sciences
    • Chemistry
      • Chemical Reactions


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Includes alignment to state and/or national standards:

This resource is part of:

Access Rights:

  • Free access


Source Collection

  • COSI classroom and online activities


  • All rights reserved, COSI Columbus, 2009