Pool Party!/Ready-to-Read Level 2 (A Click Clack Book)

Pool Party!/Ready-to-Read Level 2 (A Click Clack Book) by Doreen Cronin and Betsy Lewin

This is one of the better "Duck" books. Rather than having a derivative story, it is simply a counting book at the pool. The animals (and farmer) jump in the pool in groups, going up from one, two, three four. Then they get out in similar ways.