It's dancing water! Water ball art! Yes, it's "Aqua Dance," an interesting interior decoration that uses "hyper water-repellent" technology to create fascinating water dance shows. Just add water to the tank, pump up the pressure, and press the lever to release a dollop of water, and then sit back and watch with glee as the hyper water-repellent surface of the "field" causes the water to "bead up" and act in mysterious ways as it moves down the sloped field. And just wait till the wacky beads of water reach the vortex drains at the bottom...they spin around and go crazy! No batteries required. All you need is water and a flat place to set the Aqua Dance on! This one features a moody "rainy day" theme, with plants, wind, and umbrella patterns in the field.