Flip cube on top of another cube

My question is how do I flip a cube on top of another cube? Having a plane surface which is my ground and I have randomly spawned cubes(the same size as the cube) which i need to flip it over the cubes. I've tried few things: allocating empty game objects inside my cube to create pivot points, max friction, using pivot points to do the flipping mechanism. The problem is every time i collide with one of the cubes and try to flip it over either goes through them or it just stops.