Quantity   Component name
1 × Arduino Nano ; preferable with the pins already weld it
1 × Arduino Nano Shield I/O Extension Board Expansion XD-212
1 × Mini usb cable (most Arduino dealers provide the cable)
1 × HC-SR04 Ultrasound sensor.
4 × Mini servo SG90 9g (each one should come with 2 pointed screws and one small screw).
1 × 5V Buzzer.
6 × Female to Female breadboard connectors cable 10cm
1 × 4 AA Battery case stacked one
4 × 1.5V AA batteries
1 × Mini cross screwdriver important magnetized
1 × 3D printed head
1 × 3D printed body
2 × 3D printed leg
1 × 3D printed right foot
1 × 3D printed left foot