Why Was a Folded Paper Square Slapped onto the Ground?

In some places, children folded old exercise-book pages, wrapping paper or stiffer cigarette-packet card into compact squares. The names varied — including pa ji and ‘paper packet’ — and so did the folds. The basic play was similar. One player placed a square on the ground; another slapped down their own beside it, using the burst of air and the spring of the paper to flip the first one. A successful turn won the round. Whether it also won the opponent’s piece depended on the local agreement.

Thicker was not automatically better. A square that was too soft landed without force; one folded too heavily could be difficult to turn over itself. Children pressed the corners tight and tested different release angles. Some wanted a sharp, flat crack against the ground; others aimed just beside an opponent’s edge. The onlookers were both the judges and the next challengers. If a square rose briefly and fell back on the same face, everyone had to decide whether it counted.

Memories of this game differ greatly between cities, county towns and schoolyards, so it should not be treated as one national childhood experience. What it does show is that many toys of the period had no firm boundary as products. Scrap paper acquired weight, identity and even a small sense of property through folding, exchange and rules. When it wore out, another was made. Construction did not happen before the game; it remained part of the game.