After "I'm big - you're small," it continues, as in many families. Following the great love comes the first child, bringing a whole new life. Often, the second child arrives soon after, completely turning life upside down again – for the parents and for the first child, who suddenly has a sibling: One, two, three, four, big, small, smaller us! Every young family of four will recognize themselves in the book, where everything is remarkably different from the previous one. Even the verses are now longer.