This is not something that other model enthusiasts do as far as I know. I like to take a different approach to what others do when it comes to model cars. Takes 3 AAA batteries for the speaker.
The engine sound I have recorded is the exact sound from the real race car. For aesthetic looks I've added a real on off power switch into the base just like the real racing car had.To start the sound the button is mounted on the side of the wooden base. NOTE - Collection in person only as some of my previous models have been damaged via courier transportation in the past.