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Build a Brushbot

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15 buddy reviews
by Ben Finio, PhD
Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
robotics, circuits
how to build a brushbot


Brushbots are a simple, fun type of robot that 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 section to see what parts you need to build a brushbot, and see the Instructions 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.


  • Bristlebot kit, available in the Science Buddies Store. You will need these parts from the kit:
    • AA batteries (2)
    • 2xAA battery holder
    • 3 volt DC motor
    • Note: The kit includes enough parts to build two brushbots, or one brushbot and one Art Bot. It also contains parts for two bristlebots.
  • You will also need the following supplies (not included in the kit):
    • Scrub brush
    • Double-sided foam tape
    • Optional: Hot glue gun (adult supervision required)
    • Tape (any kind will work)
    • Cork
    • Small Phillips-head screwdriver
    • Scissors
    • Optional: Materials to decorate your robot (googly eyes, pipe cleaners, etcetera)

    materials to build a brushbot


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