This toy isn't waterproof like its popular yellow cousin, but it does offer hours of self-powered fun. Press the colored buttons and prepare to be mesmerized by the duck's lights and sounds, powered not by batteries but by a wind-up mechanism inside the duck's body.

With the goal of providing "battery-less electronic toys," Ecotronic, the company behind the duck, offers a range of wind-up toys and battery-free, animal-shaped flashlights--all packaged in biodegradable Gekopak boxes.