Active Time
1-2 hours
Total Project Time
1-2 hours
Key Concepts
Axles, wheels, gears, mechanisms

Introduction

What in the world is a differential and what does it do? A differential is a mechanism that helps cars go around turns without the wheels slipping. In this activity you will build your own working model differential from a building toy like K'Nex®!

Credits

Ben Finio, PhD, Science Buddies

K'NEX is a registered trademark of Connector Set Limited Partnership.

This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • Large set of K'Nex® or similar construction toy
  • Alternatively, you could use craft materials like pencils, toothpicks, and cardboard, although this approach may be more difficult.

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Active Time
1-2 hours
Total Project Time
1-2 hours
Key Concepts
Axles, wheels, gears, mechanisms
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