Bridges mattered.”

“Mine keeps falling when the truck goes on it.”

“Then we need to spread the weight.”

He handed me a box of blue pieces.

We built side supports, tested the truck, and rebuilt the middle when it dipped.

He asked questions faster than I could answer.

By the time our bridge held, my legs were stiff and my heart felt strangely full.

Mason drove his plastic truck over the finished span and shouted, “It works!”