The Art Bot uses a small electric motor to move. In order to power the motor, the robot also needs a battery. When you connect the battery to the motor, you complete an electrical circuit, and this allows the motor to spin. The motor has an off-center weight attached to it which causes the motor to vibrate.
When the motor vibrates, it causes the robot to wobble across the paper. This is the same technology that makes video game controllers and cell phones vibrate; on the inside, they have little spinning motors with weights attached. Your Art Bot will also have markers for "legs," so it will drawon paper as it moves.
Kit Available at sciencestore.pk: DIY Art Bot kit for Kids in Pakistan Online ScienceStore.pk