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Secret Message

In this fun math activity (page 1 of the pdf), learners exercise the creative part of their brain by trying to describe a number without mentioning the actual number (for instance, the number 12 could be described as "the number of inches in a foot"). Designed as a pre- or post-visit lesson in connection to a trip to COSI Science Center in Central Ohio, this activity is also great as a stand-alone experience.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
1 cent - $1 per student

Age Range:
Ages 8 - 11

Resource Types:
Activity, Game


Materials List (per student)


  • Mathematics
    • Measurement
    • Number and Operations


To use this activity, learners need to:

  • see
  • read
  • touch

Learning styles supported:

  • Involves teamwork and communication skills
  • 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:

  • Field Trips & Group Visits


  • All Rights Reserved, COSI Columbus, ©2009


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