Build A Bridge That Holds 100 Coins

Learn how invisible forces squeeze and pull at every part of a bridge—and why understanding them is the key to building structures that don't collapse

Discover the geometric secret that makes triangles the strongest shape in nature—and why every great structure uses them

From Roman arches to Golden Gate suspension cables—learn why different bridges solve different problems and what engineers sacrifice for each design

See invisible stress as heat maps reveal where your bridge will fail first—and how smart design spreads forces to prevent catastrophic collapse

Design, test, and iterate in simulation before touching a single matchstick—just like real engineers prototype before construction

Take your virtual design into the real world—build with actual matchsticks and discover what simulation can't teach you about craftsmanship