Hello, I'm looking for a place to buy pre-built robots. I'm trying to teach VERY basic robotics in Tunisia. I will be purchasing from overseas, so a well-known company is preferred, even if it is more expensive. I would be using PIC micro controllers (probably 16f877) and would want to help students drive a motor, display information on LCD and use some basic sensors. Looking for a simple and well built robot base. Thank you in advance for any suggestions.