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  • 8 - 15 years old
  • 30 minutes - 1 hours, 40 minutes
  • Beginner
Preview image


  • Students will build a device that uses scissor linkages to convert the direction of motion and explore the mechanics of a scissor linkage.

Key Concepts

  • Linkage

  • Force

  • Motion

  • Scissor Lift


  • Create a build that can alter its size by using scissor linkages.

  • Identify the movement of objects using this build.

  • Identify scissor linkages within professional applications like lifts and explain their ability to convert motion.

  • Apply techniques for strengthening the Grabber's scissor linkages (doubling, cross-linkages, and relocating pivot points).

Materials needed

  • VEX IQ Super Kit

  • Engineering notebook

Facilitation Notes

  • Ensure all required parts for the build are available prior to starting this STEM Lab.

  • Building with some of this build's parts can be challenging. See the Appendix for tips as needed.

  • There is a risk of users being pinched as the Grabber extends and retracts. Anyone handling the Grabber should be careful of its pinch points.

  • An engineering notebook can be as simple as lined paper within a folder or binder. The notebook shown is a more sophisticated example that is available through VEX Robotics.

  • The approximate pacing of each section of the STEM Lab is as follows: Seek - 25 minutes, Play - 30 minutes, Apply - 10 minutes, Rethink - 30 minutes, and Know - 5 minutes.

Educational Standards

Common Core State Standards (CCSS)

  • RST.6-8.1

  • RST.6-8.3

Next Generation Science Standards (NGSS)

  • MS-ETS1-3