Teach fraction sets in a hands-on, interactive, yummy way! This activity corresponds with the book The Doorbell Rang, by Pat Hutchins. As you read the story, the children draw 'cookies' in the circles to represent how the cookies are divided up when more and more guests come to the door. Then they write the fraction for the set. To make it even more fun, I buy mini Oreos (they come in a bag) and give them several cookies to divide up on a plate. They LOVE it!