As an educator I have been asked several times about how to better orient objects in your scene using the copy node. I use this technique to visualize and manipulate point normals and use those normals to align your geometry.
This is a very brief and to the point tutorial.
In this example we place Domino's on a line, if their is enough interest here I can put up a follow up tutorial where we properly procedurally texture and knock them over!
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