Hydrodynamic DesignThis toy fish adopts hydrodynamic design, using water as energy to propel the fish forward, no electricity or other energy is needed, which is very environmentally friendly and safe. The deeper you put it in the water, the farther it glides. You can adjust the fins to change the direction of the glide. Adjustable DirectionThe underwater fish toy can adjust the mode by opening/closing its wings! Modes include: long swimming/turning in the water/turning left/right! High-quality material: The underwater glider beach is made of EVA and PC. Safe, non-toxic, environmentally friendly, anti-aging, sturdy and durable! It is not harmful to children. Fun Water SportsThe most suitable diving toys for children in summer. Children's diving toys can also learn the principles of buoyancy and fluid dynamics while playing. They are suitable for parent-child interaction, playing with friends, and enhancing relationships.