Collision

There are NO collisions that come with this pack.

The reason being that collisions are a highly specific property that’s entirely dependent on the genre and style of game you are making. Some people may not need any collision, and some might need mesh colliders to highly specific collision data. If we just added boxes, we feel that 90% of the time they will be replaced immediately, and we are just creating more work for our customers.

If you want a quick and easy collision, you can add a box collider, or a mesh collider to the asset quite easily.
http://docs.unity3d.com/Manual/CollidersOverview.html