For the older kids, I got the colored pencils out. It was Johnny Appleseed's birthday and I got each kid an apple for them to draw.
The main focus of this lesson was for them to really look at the apple and see that it is not just one color, but a real mix of colors, which suited colored pencil very well. The streaks and stripes and blemishes all work with the form of the pencil. Plus, the pencil allows for some nice layering of color.