Dug out my Cybot. The one built on a fortnightly issue of Real Robots back in 2001.
I decided to convert it to use the Arduino NANO.
I am currently writing a blog on how I am doing it here: Tim's Cybot conversion to Arduino NANO Blog.
If anyone else has a Cybot and is interested you may want to take a look.
It is still work in progress at the moment, my intentions are to make it do what it did and more.
I have added Bluetooth to it as well.
Currently I have done a rough sketch (some fine tuning still needs to be done) for it that lets you:
Control it via blue tooth,
Set it in line follow mode,
Set it in light follow mode,
Set it in avoidance mode
Control it with an Infrared Remote.