well…my plan is to make a block… and make some like…a small cube land in it at the center at full speed, and when it does that, the whole block doesn’t shatter, only affecting the area it hits…get it? like, it makes a crater in the block and embeds itself there…so yeah, i’m sorry if its not well explained. if you need more explanation, please tell 
You could look at using Dynamic Paint http://wiki.blender.org/index.php/Doc:2.6/Manual/Physics/Dynamic_Paint.
Here’s an example that may give you an idea on using as a starting point it in the way you want. http://www.blenderguru.com/videos/how-to-create-realistic-rain
Do a search on dynamic paint and I’m sure you can find plenty of examples