To assemble a Lego car, we must first have a blueprint of Lego car, just like a jigsaw puzzle. Only with a clear blueprint can we assemble a complete Lego car. The next step is to collect all Lego parts, including the body, wheels, frame, front and rear, take them out and splice them according to the blueprint. The next step is to assemble these parts. According to the blueprint, the car body is spliced on the front, rear and frame, then the wheels are spliced, and finally the parts inside the car body are assembled, such as assembling the steering wheel into the car body, assembling the seat into the car body, connecting the wheels to the car body, and finally assembling the Lego car. Finally, we should do some perfect work to decorate Lego cars more exquisitely, such as painting colors on the car body and adding some decorative elements to make Lego cars more beautiful. After the above steps, the scattered Lego parts can be spliced into a complete Lego car.