In this math activity, learners read "The Button Box" by Margarette S. Reid and then make their own button boxes filled with different buttons. Learners count and classify the buttons and record their discoveries in their own books titled, "My Button Box." Learners also guess the number of buttons a pair of students can hold. Learners examine and discuss the differences in making guesses and making estimates based on definitive information. Learners analyze a class line plot of data they collect.