Children walk along the beach gathering up seashells one by one and adding them to the collection that gathers on one side of the page. After reading the book to the whole class, have book discussions in small groups. Turn to a page and ask children how many shells the children have collected. Hold the sidebars of two pages next to each other and ask children on which page have they collected more and how many more. The shells are in the same orientation on each page which makes it easier to count and compare.