It’s fun.  It’s a rhyming story, a counting story, and a build-upon-itself repeating story.  It begins in the middle of the sea with nothing to see; then there’s nothing to see but one tiny island just big enough for me and Annie McPhee; then two wee dogs who thought they were frogs, followed by three perky pigs wearing wigs….By the time they’ve spotted ten rascally rats skipping in hats, Annie McPhee shouts, “Too crowded for me!” and the two original island inhabitants set off to sea on the head of a whale, leaving the tiny island to the rest of the crowd.