What makes your bot move is a small cell phone motor and a 3 volt battery.  You will notice that the motor has a red wire and a blue/black wire. The battery has a positive side, denoted by a + and a negative side, which will be blank or be denoted by a - sign. You will need a few small pieces of duct tape to attach the two together and create the vibration.

Using duct tape, attach the blue or black wire to the negative side of the battery.

Do the same with the red wire, attaching it to the positive side of the battery.  Your motor should now vibrate.

Using wire cutters carefully cut the top off of a toothbrush.

Use your scissors to trim the bristles of the toothbrush into a slant.  This helps the bot move forward.

We added googley eyes to our bot to give him some personality.

Attach a small piece of putty to the top of your toothbrush piece.  We are using putty here because you want to be able to remove the motor when the battery dies.

Press the motor/battery assembly down into the putty attaching it to the toothbrush.  You are all done!