Forty paper bridges and one very heavy book

The brief was simple and slightly ridiculous: one A4 sheet of paper, span the gap between two desks, and hold up the heaviest book we could find. No tape, no towers, no cheating. Just the paper and your wits.

The first bridges went down fast. A flat sheet laid across the gap won't hold a feather, let alone a dictionary — and the children felt that disappointment in their hands, which is exactly the point. Then someone folded their sheet into tight concertina pleats, and it stood. A small crowd gathered.

By the end we had forty bridges and a clear winner. The lesson wasn't really about paper. It was that shape beats material — that how you fold a thing matters more than what it's made of. They worked that out themselves, by building and breaking, not by being told.

The team whose bridge held the fattest dictionary didn't cheer loudly. They just looked at it, then at each other, with the quiet pride of people who made a thing that worked. We'll take that over a full-marks worksheet any day.