LEGO MINDSTORMS Robot Inventor
This truck has four wheel drive using four independent motors, and it also features four wheel independent "spring" (rubber) suspension, allowing each wheel to move up and down independently. Although the front wheels don't steer, the truck can still turn on carpet using the simple skid steer method.
Drive it using the remote control program and see what you can climb over. Instructions are provided for a ramp and a small car to climb over. It will even climb over the ramp in the steep direction!