Six pictures of one thing down the left, six pictures of more than one down the right, shuffled. The child draws a line from each singular noun to its plural: car to cars, bear to bears, walrus to walruses.
Seeing the two forms of each word next to each other is what makes the pattern click. A child can see exactly what was added to the end, and that walrus and lunchbox get more letters than car and bear.
It is a quick, satisfying sheet with no writing, which makes it a good warm-up before a page where the plurals have to be spelled out.