The kids spent a couple of weeks learning about perspective in their art class. Even ED did her own drawing! They came home with some really pretty art work!
Here is LD working on his homework for art class:
The kids used oil pastels to add color to their drawings.
If you are interested in doing a lesson on perspective with your kids here are a couple good resources:
Deep Space Sparkle: One Point Perspective Art Lesson very similar to the ones my kids did above.
Art Projects for Kids: Kathy has a neat series of lessons on perspective.
Art Integrity: Has a really wonderful explanation of how perspective works and shows some good examples of perspective in paintings.