I had originally wanted to do corn kernals on the letter C but that fell through when I discovered that my construction paper would not fit into my page protectors in the binders. I wanted each letter to be in the covers so items like the corn kernals would not fall off with the children looking at their alphabet book repeatedly. But I like the circles too, so everything worked out.
Stop over at Sandy's blog and check out all of the other amazing ideas she has for things to do with your kids. She is constantly giving me ideas and inspiration!