Arduino four wheel robot

Hi Guys please sometimes ago i built a robot and i felt accomplished, but now i am kind of confuse, of what to do next here is a link of the robot please help me suggest how to improve it, thanks:

i had to make it slow

It seems to be working well.

I have no idea how YOU might want to improve it,

One of the ideas that comes to my mind is to build an attractive body to cover the mechanism.


PS ... How about writing a piece for the Exhibition / Gallery section of the Forum to explain how you created it and how other Forum users could make their own versions?