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Structures (Bridge & Tower Builder)

Design a bridge and stress-test it under load, or build a tower and crush-test it — then watch it hold, or crumble. Engineering, physics, and problem-solving in one.

Grades 4–10PhysicsEngineering

Students design a truss bridge, then put it under load and watch the physics play out — members stretch and compress, color-shift under stress, and fail if the design can't take it. It turns engineering iteration into a game: design, test, learn, redesign.

Built-in challenges, class leaderboards, and a teacher gradebook make it easy to run as a competition — designs are ranked on efficiency, rewarding the bridge that holds its load at the lowest cost.

Tower Builder is the other half of the set: students build a lattice tower on a limited footprint, then a press plate lowers onto it and the crush load climbs in pounds until the tower holds — or lets go. Same steel, same joints, same costs as the bridge, so what a class learns on one carries straight over to the other.

Structures (Bridge & Tower Builder) artwork

How a class uses it

  • Run the Bridge Challenge: everyone gets the same span and load, and the class leaderboard tracks whose design does it most efficiently — and at the lowest cost.
  • Teach forces by watching them: tension and compression are color-coded live under load.
  • Pair with a physical build — design and test digitally first, giving students confidence in their design before investing the time to construct it from classroom materials.
  • Run the Tower Challenge: same footprint, same target height, same load for everyone — the leaderboard ranks the tower that survives the crush test at the lowest cost.

See it in action

The design canvas — span, load, materials, and a budget to beatA truss under stress test — every member color-coded by loadTeacher view — bridge assignments with results, designs, and costsTower Builder — an X-braced tower holding its full crush load

Put Structures in front of your class

It takes about a minute to get started — free, no credit card required.