Brushbrobot

(18+ category) I'm 40 years old and I've constructed (with some help from my daughters!) this vibrobot (for those who do not know how they work, vibrobots shake due to the imbalance created purposefully in the shaft of their motors). I chose to call it Brushbrobot because it's a bristlebot, but big. 
This is much easier to construct than a small bristlebot and has better performance (bigger pieces, no need for a special vibrating motor, more standard battery, longer autonomy, on-off switch added). It also allows for a rechargeable battery (highly recommended).

Step 1 Materials

Nail brush
9V motor (lower voltage motors could work too)
9V battery (rechargeable recommended)
9v battery clip
Crocodile clip
Piece of wire (any color. I got mine cutting in half the red wire from the battery clip in half, which was long enough)
Unipolar on/off switch 

Comments

[Danny1433]

why r 18

[mad10000]

I don't know if I fully understand your question, but the contest was divided in three categories. I won in the "above 18" years old category the "Simplest bot" prize.

[keithosmarferrer]

thats simple and cool so i voted you on the nrw contest .

[mad10000]

Thank you!