Meet the Leo Rover: a 4WD robot kit built on Raspberry Pi. It has 5kg payload capacity and a waterproof body. This outdoor robotics kit is ready for video streaming and autonomous operation. It comes with 4 x in-hub DC motor and 130mm rubber tires. It can overcome obstacles up to 70mm.
This robot comes with a 5MP camera, 170-degree lens, and WiFi connectivity. It can be extended with additional sensors and add-ons. You can find out more about it here.