Build a robot

Hi i have heard that you could build a very simple robot from forexample a walkman or a discman, like just walking foreward... i have this science project and ofcourse i want to impress the teacher... so is their annyone who knows how to do that? in a VERY VERY simple way?
(if my english issent too good its because im 15 years old and form norway :lol

YOu should try making them from a floppy drive... Most people have old unused A drives laying around. Check out this website https://ohmslaw.com/robot.htm

Ivancho