Fit the colorful, uniquely-shaped duck pieces together atop the wobbly suction-cup feet and then pour water over the bright green spinner to see the wings go flap, flap, flap.

Take it apart and put it back together. Let the duck float freely through the water. Or, use the whole thing as a scoop to pour water over your suds-covered head. Buildable, stackable, puzzling fun for the bathtub is like water off a duck’s back with Quack Stack!