Here's an article about him.
Here's a video of him making one of his pieces. It's really cool to watch.
I think it would be fun to attempt a salt labyrinth for the fun of making art out of a different medium. Or what about using flour instead of salt? It might be fun to do if your studying minataurs and labyrinths or NaCl in chemistry!
Here is Motoi Yamamoto's website if you'd like to see more.