The Hydrodynamic Building Set is an awesome building set that will give you and the kids hours of fun while learning at the same time. The set includes three hundred pieces including tubing, tank parts, girders, tube connectors, valves, meters, and more along with an electric pump with an AC adapter, carrying case, and instruction book. The fun starts when you use your imagine to create all kinds of structures over and over again. For larger structures, you can purchase more than one building set and have a gigantic toy that will provide many hours of fun while building and then playing all sorts of games.

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