Arjun looked at the broken bridge. He saw iron rods, angles, and triangles. "We can't cross the bridge," he said. "But we can build a smaller one using math."

Riya added, "The PDF would have given us answers. But building the bridge gave us understanding."

Riya was sad. "Without the bridge, we can't get the book. We'll fail the competitive math test."

Suddenly, the weekly trip to the town library and the calculator shop became impossible. The school exam was three months away, and their teacher, Mrs. Gupta, had strongly recommended the for Class 6. "It builds your foundation like cement," she said. But the only copy was in the town bookshop, now unreachable.