In this paper, the authors propose an approach for the navigation of mobile robots namely Khepera 3 and iRobot create in a designated environment. In this paper, the navigation system of Khepera 3 includes the motion of the mobile robot at a particular angle to reach a particular goal and avoidance of the obstacle that may occur in its path. Obstacle avoidance is realized using blending and hard switching techniques respectively and the navigation system of iRobot create includes its movement in a rectangular path. In controlling the navigation of the robots, Proportional-Integral-Derivative (PID) controller is used.