Only $3 and takes all of five minutes. Completely solderless to boot.
For a smaller bristlebot kit thats great for adults and kids, visit BrownDogGadgets.com. You'll have a little bristlebot running aound your place in no time.
Step 1: What You Need
Dollar Store Items
$1. A Cheap Electric Toothbrush. We're stealing it's motor.
$1. A cheap scrub brush. Try to get one with little to no rubber grips on it.
$1. AA Battery Holder. With attached leads.
$0.50 A little switch. Optional really.
Around the house
Copper Wire. Steal from other stuff if you can, you only need a tiny bit.
Hot (melt) Glue Gun
Wire Strippers (Optional)
Step 2: Solder if you want...
Step 3: Switches Me On
Hook up your positive wire to the middle of the switch. Be sure to wrap that wire around there nice and tight!
Then wrap another wire around one of the other legs.
Seriously though, you only need like 2 inches of wire for this entire project.
Step 4: Motor Mouth
Hook up the negative wire from the battery.
Don't worry about positive and negative when it comes to two tabs on the motor. In this case it doesn't matter one bit.
Make sure you wrap the wire around!
Now... give it a test....
Step 5: Glue Me Tight
Try putting the motor out front first. Rip it off and move it around if your bot starts going in circle.
You're finished. Gee, that was easy.