I have a scene where particles collide nicely with a floor plane. These particles are released from a cube object (let's call it Cube 2 for clarity) when something falls on it to simulate it breaking through. Currently, however, that falling something (another cube that I'll call Cube 1) goes straight through Cube 2. I made sure that Collision physics are on for Cube 2 and that they are on the same layer but they still don't collide.
Lastly, Cube 2 has a Particle System, but the particles don't move at all. Any thoughts?
Here is my .blend file: