Car

1.Materials:

-1 motor
-Battery
-1 limit swich
-1 swich
-Wood
-Cardboard
-Plastic wheels
-1 relay

2.How does it work?

                                         When the car meets an obstacle or barrier, 

                                  the wooden piece moves and makes 

                                      contact with the limit swich,wich sends

        a signal to the relay.

                                        When the metal piece of the relay moves,

                                          and thanks to the battery, the motor makes

                                         the wheels change the direction of the car

             3.How we made the project

    First of all, we cut the pieces of wood fllowing the

                                                             design we did. When we finished them, we continued joining

                                                               them with glue, and we screwed the components of the circuit.

                                                        Then we sticked the components to the base and weld the 

                                                            axes of the wheels. The bodywork is made of red cardboard

               and wheels are made of plastic.