There are so many exciting features in the BIG-Waterplay Niagara set. These include a reservoir with pump and two lock gates, a downwards sloping waterway, a removable crank handle, as well as three different boats and a water plane to ensure that the four play figures provided can enjoy a whole variety of adventures.The boats sail quickly along the channels of the playset. The necessary current is created using the crank handle, which can be easily removed from the playset to allow the two boats provided to enjoy an uninterrupted sailing trip around the waterway system. The journey takes them through a lock system and around the system of channels. In the upper section, the reservoir provides the required current.This waterway system offers tremendous play value and its modular design enables it to be easily combined with the Rotterdam playset without the need for adhesive.