Here is the two wheeled vehicle modeled in MindRover. It is very easy to construct using LEGO bricks. Within MindRover, the 2 motors are contolled with one component, the RCXDualEngine.

You may make changes to this design, but if you would like to simulate this robot in MindRover, you need to keep these items the same:

• Each wheel has its own motor.
  
  
• The vehicle moves like a tank: turning on only the left motor will turn the vehicle to the right; turning on only the right motor will turn the vehicle to the left; turning on both will cause the vehicle to go straight.
  
  
• Two ports are being used to control these two motors. The default in MindRover are ports 1 and 3 (or A and C). If you use other ports, you need to change the default settings in MindRover by clicking on the RCXDualEngine component.

	STEP 1: Bind two motors together using 2 flat 1x4 bricks and 2 flat 2x4s on the bottom.
	STEP 2: Add 3 2x4 flat bricks on the top as well; 2 next to each other and the third one directly on top of the one that will face towards the front of the vehicle.
	STEP 3: Add two large wheels using the grey axle connectors.
	STEP 4: Get a large flat 6x16 brick for the base. Attach 2 2x2 bricks and a rounded slider foot.
	STEP 5: Attach the wheel assembly to the back of the base.
	STEP 6: Attach the RCX brick onto the base. Make sure the infrared port is facing forward.
	STEP 7: Add a flat 2x4 (or similar) brick to bind the wheel assembly to the RCX on the top.

The wheels are in the back of this vehicle. The slider and RCX infrared port are in the front.

Wire the RCX to the motors so that the left motor is connected to output port A, while the right motor is connected to output port C. Make sure that they are connected so that the forward direction rolls the vehicle in the direction of the slider foot.

When you download your first moving program for this vehicle, if it does not travel in the correct direction, rotate the wire connection at either the RCX or the motor end.