A long time back, during my college days, I had built a line following robot using an 8051 microcontroller. After college that robot aged and died in my backyard shed. Ever since I’ve been planning on resurrecting her, and finally did, using an Arduino Uno.
To make the robot platform I used two geared motors from an old toy crane, and a cheese tub.
Here’s a view after attaching a front wheel and IR sensors.