Hydrodynamic DesignThis toy fish was designed with hydrodynamic force which uses water as a power source to drive the fish forward without electricity or other power source, which makes it very eco-friendly and safe. The more you put it in the water, the more it slides. And you can adjust the fins to change the direction of the glide. High Quality MaterialsThe underwater fish toy is made of high quality reusable EVA+PC materials. Safe, eco-friendly, anti-aging and sturdy soft and flexible, healthy and safe. It is not harmful to children. Adjustable OrientationThe underwater fish toy allows you to adjust the glide mode by turning the wings on or off the following modes are available: Wings open for long swimming. Narrow wings for sprint swimming. Right wing open, left turn. Left wing closed, right turn. Sophisticated DesignThis hydrodynamic toy has an extremely realistic design in the shape of an evil fish, which looks like a real fish when it glides through the water. The more you put it in the water, the farther it slides. SummerThe perfect summertime underwater slider for parent-child interaction and fun in a multitude of environments. take this fish toy to the pool, river or sea in summer and have fun. In addition, you can compete with your child or a friend to see which of the two will slide the most.