Meet the SDR Programmable WiFi Development Robot: a research bot that can be modified for your own projects. It has a chassis that allows easy modification. It comes with a 4WD IG32 Direct Drive Robot Chassis with 6 inch wheels, IG32 12VDC 053 RPM gear motors, and a pan/tilt camera system. It has a web-based interface.
This robot has an Arduino Mega 2560 R3 microcontroller. It lasts up to 4 hours on battery. You can control it from your phone or tablet.