String Spinners

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Project Snapshot

Explore the concept of angular momentum with this fast-spinning contraption.

Try out different numbers and positions of wheels to create spinners that rotate like tops, or seem to defy gravity by spinning diagonally!

Step 1
Step 1

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Step 2
Step 2

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Step 7
Step 7

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Step 1
Step 1

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Tools and Materials

The Engineering Creation Kit has everything you need for this project and many more from STEM Inventions, or get the supplies in bulk:

Tips and Troubleshooting

If the spinner isn't spinning for very long, then...

  • Make sure to pull down quickly and in a linear path. Pulling slowly or off to the side won't work.

  • Tilt the launcher forward as soon as the string releases from the spinner.

If the wheels or cable tie are sliding around the dowel, then...

  • Apply a small amount of glue where the wheel hub or cable tie touches the dowel.