The POOF-Slinky 7400 Slinky Science Our Amazing Bridges is a fun and educational architecture kit that brings out the science and art of building bridges. You’ve probably seen many different types of bridges including, highway overpasses, drawbridges, massive steel-girder railroad bridges and soaring suspension bridges. What are the advantages and disadvantages of each type? Why choose one over another? What is the science behind bridges and how does a delicate looking suspension bridge support so much moving weight? Our Amazing Bridges will help you discover the answers to these questions and more. This kit comes with everything you need to build (3) different bridge types (Arch, Truss and Suspension) and teaches you the mechanics and physics behind bridge building. The 48-page Fun and Fact Manual provides step-by-step instructions to build your scale models, painting guide and additional information about bridges and their history. This set includes a landscape, painting guide, (2) plaster mixes, voussoir mold, sandpaper, nylon thread, (2) adhesive squares, (3) wooden sticks, paint set, marker, sheet roadbeds, sheet, towers and supports, (2) tower bases, (2) anchorages, scraper, paint brush, (4) A-gussets, (4) B-gussets, (4) C-gussets, (29) I-beams and a 48-page fun and fact manual. This is Slinky Science experiment number 157 of a series of science kits that combine elements of learning and fun to provide hours of educational entertainment. The POOF-Slinky 7400 Slinky Science Our Amazing Bridges Model Building Kit is recommended for children 8-years of age and older. POOF-Slinky, Inc. is the maker of Poof, Slinky, Ideal and Scientific Explorer Brands. Our product lines offer new exciting play with the highly successful Sno-Toys line, Fuzzoodles activity kits, as well as timeless classics, such as the original Slinky, Ideal table-top games, wood construction sets and over 400 other products.