Setting an Object to a variable after collision

I'm currently working on a small Unity game, and have run into a problem. I have the player and the objects sending messages between each other on collision, but it only seems to work on the objects I had designates as the "CurrentCube". I tried to set the collided object to CurrentCube, but my current set-up(shown below), has it setting the player itself to current cube:

 void OnCollisionEnter(Collision collision)
     {
         print ("Test");
         if (collision.gameObject.tag == "Others") 
         {
             CurrentCube = gameObject;//Find a way to set this object to Cube(currently makes the player becomecurrentCube and breaks the game)
             CurrentCube.SendMessage("Checker",Size);
             Debug.Log ("Are we sending");
         }
 
 
     }

Is there a way to the the object that I collided with to become the currentCube?