"Mindstorms" lego contains electronics and computer chips to control functions.
But you can program a lego vehicle without any electronics except for a basic motor.
Here is Stage #2 of the prototype I'm working on - I say prototype because I think even when I've finished it I'll rebuild a better version.
My vehicle can be programmed (using a mechanical card that you feed into it) to steer left and right and move forward and backward. Stage #3 will have other functions too.
I have to laugh at how loud it sounds - I heard that noise is a sign of poor engineering! But I'm a French teacher, not an engineer! I have an ARTS degree!
In the video you'll see the vehicle in action for a minute and then an explanation and some close ups of the mechanisms.