Unlock the secrets of bridge building. These sets give budding civil engineers and designers a chance to build and test several types of bridge designs, including some of the most recognizable, world-famous bridge constructions. Twelve comprehensive work cards and lesson plans provide step-by-step instructions to piece together truss, suspension, cantilever, draw bridge, cablestay, swing and bascule bridges. The set will encourage and challenge children to go beyond the set shapes and to experiment with their own creations. Set includes enough to build all eight bridges at the same time.