Four cheerful caterpillars stretch across the page in green, orange, purple and blue, each with five empty body segments and five numbers printed above it. A child writes the numbers into the segments from smallest to largest, head to tail.
Five numbers instead of four is a real increase at this stage, because a child can no longer hold the whole set in mind at once and has to work through it. The caterpillar helps with that: it runs left to right and the segments are already there to be filled, so the order is built into the picture rather than something to keep track of. Every number stays within 20 and none repeats along a body.