Replace Mesh

7.  Add a Sensor
  • Select Cube
     
  • Logic Editor >> Sensors >> Add Sensor >> Keyboard
     
  • Key >> Spacebar
Note:
  • For this tutorial, I'm using an Spacebar Keyboard sensor.

8.  Add a Controller 
  • Logic Editor >> Controllers >> Add Controller >> And
Note:
  • For this tutorial, I'm using an And Controller.
9. Add a Replace Mesh Actuator
  • Logic Editor >> Actuators >> Add Actuator >> Edit Object

  • Edit Object selection box >> Replace Mesh

Note:
  • Replace Mesh is a part of the Edit Object Actuator

  • The Replace Mesh Actuator has to be on the Object that is having it's mesh replaced