Yookidoo Flow N' Fill Spout is a Unique Bath Toy That Offers a Variety of Options for Bath Time Fun Water is Drawn Up and Through the Battery Operated Spout Creating an Endless Stream Through Three Interchangeable Tumblers Each Tumbler Features its Own Exciting Spout Function - Use the Tumblers Individually Or Stack Them and Watch the Water Run Through All Three At Once! Swiveling Arm Holds the Tumblers and Can Be Placed Directly Under the Stream or Pushed Off to the Side. The Spout Swivels, Too! Yookidoo Flow N' Fill Spout is a Unique Bath Toy That Offers a Variety of Options for Bath Time Fun. Takes AA Batteries (Best with Polaroid AA Batteries), Water is Drawn Up and Through the Spout Creating an Endless Stream Through Three Interchangeable Tumblers, Each Tumbler Features its Own Exciting Spout Function - Use the Tumblers Individually Or Stack Them and Watch the Water Run Through All Three At Once!, Swiveling Arm Holds the Tumblers and Can Be Placed Directly Under the Stream or Pushed