Safety Warnings:[IMAGE]CHOKING HAZARD - Small parts. Not for children under 3 yrs. This is one of our most popular sets! It has all our great play features: the crane that can lift containers onto the transport boat, the water lock in which the vehicles can go in and out, and the slipway allowing the amphibian car to go from land to water. The turning of the paddle wheel makes the water flow through the canals, a playful way of educating how the water moves, lifts and climbs! Combine this set with either AquaPlay 503 Portable AquaBox or AquaPlay 612 Portable AquaLand and you"ll get a huge water canal system (AquaPlay 544, MultiSet"n Go). Of course you can combine it with other AquaPlay sets and extensions as well.