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if I'm not able to construct the bottom part of the robotic car, I could always take it from a toy car and substitute the electric part of the toy car with other pieces to make the car Parallel Park automatically.

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Another idea for the bottom part of the car would be 3D printing the whole piece, or piece per piece. Probably piece per piece as the wheels may not work if 3D printed as a whole piece. What I could do is look how a toy car looks on the inside and 3D print the pieces so that I could put them together to for the bottom part of the self-parking robotic car.

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This is how I would personally want my car to look on the inside. Apart from the front wheel, as I would want my robotic car to have 4 wheels. The functions would look similar, as the top part will be used to control and turn the car.

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For the top part of the car my idea would be creating a car-ish looking cover with cardboard.

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Another idea for the top part of the car would be taking the top part of a toy car and using it for the robotic car.

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For the top part of the car I could also 3D print it as a whole piece with a plain color (for example

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depending on the space between the cars, I need to create a car which fits on the free parking space. To be able to Parallel Park I'll need to have an automatic self-parking robotic car, following the VEX IQ ROBOTC methods, depending on my choice.