Build a bridge that can hold rocks with your child. One at a time, place rocks in the center of the paper and observe how many rocks the paper can hold before it falls. Ask your child what he thinks ...

Not too long ago in England’s Grisedel Valley, about an hour’s walk from the nearest town, the hills gave way to a red bridge. It was small–just large enough to allow a few people to cross a creek.

There’s a bridge in the north of England that’s made of 22,000 pieces of paper. Before you ask, yes, you can walk across it. A simple poppy-red arch, the bridge is the work of Steve Messam. Messam is ...