They also practiced putting the shapes in their shape sorter. (We have a more manly version of this toy as well, but Charlie isn't afraid to like pink.)
We used shapes to make houses for an art project, and watched Baby Einstein Discovering Shapes.
"Hooray! I'm a shapes super star!"
On a totally unrelated note, Lily cracked us up the other day and I had to share. I was in the kitchen cleaning up lunch and I heard Lily start freaking out in the living room. I looked in and saw that she had pulled her sleep sack off the pack n' play, where it had been hanging, and had managed to get her head stuck in it. She was crawling around in a panic with the sack on her head, totally stuck. Of course, I hurried to help her get free...but not before I took a few pictures first ;)