The lowest-priced brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable).Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.See details for additional description.
For ages 9 to 12 years. Build bridges of your design -- from the 'workhorse' truss-beam bridge to the dazzling suspension bridge. Use bridge-building basics, and, along the way, discover how science and creativity come together in the creation of those weight-bearing wonders -- bridges. Choose the best bridge design for different sites. Make decisions about cost, safety, materials, and the environment. Build and invate using available materials. Test your construction for function and load.