Motion-Sensing Spider


9 and up

This spider has a secret - the hidden motion sensor that will cause it to drop down onto whoever walks by. Eek! Learn a bit about electronics, practice creating a circuit, and experiment with a motion detector component while building this creepy motion sensing spider!


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Get ready for some seriously spooky fun — with a surprise spider that senses motion! Rig up an electric circuit with a motor and a motion-detecting sensor, then watch as your creepy critter contraption drops on unsuspecting victims, er, friends. This is one trick that’s a treat to build!



  • Motion Detection
  • Electrical Components
  • Instruction booklet
  • A Spider Surprise!

Learn more!

Watch step by step instructions for your Motion Sensing Spider by KiwiCo.


Watch How Does a Motion Sensing Circuit Work? by KiwiCo.


Learn about Passive Infrared Sensors by ScienceDirect.


Watch How PIR Motion Sensors Work - The Learning Circuit by Element14

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