This would be a fun 3D model for the kids to make. 3D City by Anna Paschenko | Abduzeedo Design Inspiration
Another great use of perspective. I think the most interesting part about this is the colors and the way the red appears to come up from the bottom of the image and glow as it gets closer to the top, which is a really neat effect.
Night of Seoul city on Behance
different color isometric drawings by http://nigelsussman.com
1992 An illustration for a book about the Lithuanian independence, unfortunately the book haven't reached shelves.