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Build a Brushbot

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14 buddy reviews
by Ben Finio, PhD
Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
robotics, circuits
an assembled brushbot


Brushbots are a simple, fun type of robot you can build out of arts and crafts materials. They are easy to build and you do not need any previous experience with robotics. You can build them yourself, build two robots with a friend and race them against each other, or even make them sumo wrestle! Go to the Materials tab to see what parts you need to build a brushbot, and the Instructions tab for a step-by-step guide on how to build one.


Ben Finio, PhD, Science Buddies
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 1,150 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.


The following materials are available in the Science Buddies Store:

  • Bristlebot kit (1). To build a single brushbot, you will need these parts from the kit:
    • 9 V battery
    • 9 V battery holder
    • 9 V battery motor
    • Note: The kit includes enough electronics to build two additional types of simple vibrating robots. See the kit instructions page for details.
You will also need the following supplies (not included in the kit):
  • Scrub brush
  • Double-sided foam tape
  • Electrical tape
  • Cork
  • Small Phillips head screwdriver
  • Scissors
  • Recommended: Hot glue gun (this will provide stronger connections than tape)
  • Optional: Materials to decorate your robot (googly eyes, pipe cleaners, etc.)


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Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
robotics, circuits