I drew lines in pencil for the cookie on the last page to make cutting easier. This page could also say "4 fourths."
These are two free printables that I made to give my students more practice in coloring a half or a fourth of a shape. Click on the images to print them.
Of course we also read Give Me Half!
This led to a discussion of how greedy the kids in the book were....
And the pizza restaurant is set up in dramatic play. I use a set like this one
with pizza pans from the dollar store. It gives the kids some hands-on experience with fractions. (We don't actually play the game with the pieces.)
I'd love to hear how you teach these concepts.