Vibro Monsters

This activity is the second part of a fun and interesting activity: "Vibrobots"

Creating a Vibro Monster is a more creative and engaging activity. We use to perform it after having simple robot controlled by a single vibrating motor. It can be made from a toothbrush head or velvet and a few low-cost materials and can easily be modified for additional challenge. The vibrations from the motor travel down the bristles and cause the brush to move on flat surfaces.

 Vibro Monster


  • Nail brush
  • 3V DC  Motor 
  • AA Battery Holder
  • 2x AA Batteries
  • Foam Tape or Double-Sided Tape
  • Cork
  • Cardboard, Paper, Straws, Wires, etc.


 Activity - Building a Vibro Monster

  1. Grab the nail brush and cover its surface with a piece of foam tape.
  2. Stick Battery holder on one side of the nail brush and the 3V DC motor on the opposite side, near to the cut edge of the brush.
  3. Attach the Cork to the Motor. This will act as an unbalanced load so make sure that it does not hit the nail brush at any point.
  4. Connect both cables from the battery holder to the Motor's terminals. Remember that the battery holder must have a built-in power switch, if it does't, a switch must be attached. 
  5. Decorate the Vibro Monster with any recyclable materials. Use decorations to help stabilize the robot.
  6. Have Fun!!!

 Encourage students to experiment different solutions to stabilize the Vibro Monster. 

Is it possible to get the Vibro Monster to run straight? Place the Motor and the battery centered on the nail brush, switch the order of the cables connected to the motor in order to change rotation's direction.


    Analyze the results:

    Did you experience the same problems as when you built the Vibrobot?

    Which robot was easier to stabilize? The Vibrobot or the Vibro Monster? Why?


    ISTE Standards

    4.c. Students develop, test and refine prototypes as part of a cyclical design process.

    4.d. Students demonstrate perseverance when working with open-ended problems.  

    5.c. Students break down problems into smaller parts, identify key information and propose solutions.

    5.d. Students understand and explore basic concepts related to automation, patterns and algorithmic thinking.


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